Managing spectra of modulated signals in a communication network
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H03K-009/00
H04L-027/00
출원번호
US-0219863
(2011-08-29)
등록번호
US-8416887
(2013-04-09)
발명자
/ 주소
Yonge, III, Lawrence W.
출원인 / 주소
Qualcomm Atheros, Inc
대리인 / 주소
DeLizio Gilliam, PLLC
인용정보
피인용 횟수 :
1인용 특허 :
244
초록▼
Information is modulated onto frequency components of a signal. The resulting modulated signal includes at least some redundancy in frequency enabling a portion of the information modulated onto selected frequency components to be recovered from fewer than all of the selected frequency components. C
Information is modulated onto frequency components of a signal. The resulting modulated signal includes at least some redundancy in frequency enabling a portion of the information modulated onto selected frequency components to be recovered from fewer than all of the selected frequency components. Controlling the spectrum of the modulated signal includes enabling the amplitude of at least some frequency components of the modulated signal to be set below a predetermined amplitude used for modulating the information.
대표청구항▼
1. A method for operating a communicating station in order to transmit information through a communication medium using a set of channels, wherein the channels have respective carrier frequencies, the method comprising: determining a list of one or more of the carrier frequencies over which transmis
1. A method for operating a communicating station in order to transmit information through a communication medium using a set of channels, wherein the channels have respective carrier frequencies, the method comprising: determining a list of one or more of the carrier frequencies over which transmissions are to be attenuated;encoding information bits according to an error correction code in order to obtain coded bits, wherein the coded bits represent the received information bits with redundancy;interleaving the coded bits to obtain interleaved bits;mapping blocks of the interleaved bits to corresponding sets of complex numbers, wherein each set of complex numbers includes one complex number for each of the carrier frequencies;modifying each set of complex numbers by attenuating one or more of the complex numbers in the set that correspond to the one or more carrier frequencies on the list, wherein said attenuating includes scaling the one or more complex numbers so that their amplitudes are less than a predetermined amplitude level;computing an inverse Fourier transform of each modified set of complex numbers to obtain a sequence of time-domain samples; andtransmitting a time-domain signal over the communication medium based on the sequence of time-domain samples. 2. The method of claim 1, wherein the one or more carrier frequencies on the list are determined without negotiating with any other communicating station over the communication medium. 3. The method of claim 1, wherein the one or more carrier frequencies on the list are determined without exchanging messages with any other communicating station over the communication medium. 4. The method of claim 1, wherein the list is not provided to a receiving station that receives and demodulates the time-domain signal. 5. The method of claim 1, wherein the predetermined amplitude level is zero. 6. The method of claim 1, wherein the predetermined amplitude level is an amplitude level that based on a regulatory limit for radiated power. 7. The method of claim 1, wherein the predetermined amplitude level is a level that ensures non-interference with one or more other communication stations. 8. The method of claim 1, wherein the said interleaving spreads coded bits across different blocks of the interleaved bits. 9. The method of claim 1, wherein said interleaving spreads coded bits over the carrier frequencies. 10. The method of claim 9, wherein said interleaving spreads coded bits uniformly over the carrier frequencies. 11. The method of claim 1, further comprising detecting transmission from another communication station over the communication medium, wherein said determining the list includes adding one or more of the carrier frequencies to the list in response to detecting said transmission. 12. The method of claim 1, wherein said mapping of blocks of the interleaved bits to corresponding sets of complex numbers includes applying a tone mask to avoid one or more frequencies specified by the tone mask, wherein one or more complex numbers in each set that correspond to the one or more specified frequencies are set to zero and are not determined by the interleaved bits, wherein the tone mask is determined by negotiation with another communication station over the communication medium. 13. The method of claim 1, further comprising: scrambling the information bits prior said encoding the information bits. 14. A communicating station including a system for transmitting information through a communication medium using a set of channels, wherein the channels have respective carrier frequencies, the system comprising: memory for storing a list of one or more of the carrier frequencies over which transmissions are to be attenuated;an encoding unit configured to encode information bits according to an error correction code in order to obtain coded bits, wherein the coded bits represent the received information bits with redundancy;an interleaver configured to interleave the coded bits to obtain interleaved bits;a modulation module configured to: map blocks of the interleaved bits to corresponding sets of complex numbers, wherein each set of complex numbers includes one complex number for each of the carrier frequencies;modify each set of complex numbers by attenuating one or more of the complex numbers in the set that correspond to the one or more carrier frequencies on the list, wherein said attenuating includes scaling the one or more complex numbers so that their amplitudes are less than a predetermined amplitude level; andcompute an inverse Fourier transform of each modified set of complex numbers to obtain a sequence of time-domain samples. 15. The communicating station of claim 14, wherein the system is configured to determine the one or more carrier frequencies on the list without negotiating a change in modulation scheme with a receiving station over the communication medium. 16. The communicating station of claim 14, wherein the system is configured to determine the one or more carrier frequencies on the list without exchanging messages with any other communicating station over the communication medium. 17. The communicating station of claim 14, wherein the list is not provided to a receiving station that receives and demodulates the time-domain signal. 18. The communicating station of claim 14, wherein the predetermined amplitude level is zero. 19. The communicating station of claim 14, wherein the predetermined amplitude level is an amplitude level that based on a regulatory limit for radiated power. 20. The communicating station of claim 14, wherein the predetermined amplitude level is a level that ensures non-interference with one or more other communication stations. 21. The communicating station of claim 14, wherein the interleaver is configured to spread coded bits across different blocks of the interleaved bits. 22. The communicating station of claim 14, wherein said interleaver is configured to spread coded bits over the carrier frequencies. 23. The communicating station of claim 22, wherein said interleaver is configured to spread coded bits uniformly over the carrier frequencies. 24. The communicating station of claim 14, further comprising a receiver, wherein the communicating station is configured to add one or more of the carrier frequencies to the list in response to the receiver's detecting of a transmission from a licensed entity. 25. The communicating station of claim 14, wherein said modulation module is configured to apply a tone mask to avoid one or more frequencies specified by the tone mask, wherein one or more complex numbers in each set that correspond to the one or more specified frequencies are set to zero and are not determined by the interleaved bits, wherein the tone mask is determined by negotiation with another communication station over the communication medium. 26. The communicating station of claim 14, further comprising: a scrambler configured to scramble the information bits prior said encoding the information bits. 27. The communicating station of claim 14 further comprising: a front end configured to transmit a time-domain signal over the communication medium based on the sequence of time-domain samples.
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이 특허에 인용된 특허 (244)
Kumar Derek D., AM-compatible digital broadcasting method and system.
Ahmadi Hamid (Somers NY) Bantz David F. (Chappaqua NY) Bauchot Frederic J. (LaTourraque Saint-Jeannet NY FRX) Krishna Arvind (Briarcliff Manor NY) La Maire Richard O. (Yorktown Heights NY) Natarajan , Adaptive medium access control scheme for wireless LAN.
Omidi,Mohammad Javad; Alavi,Hossein; Chini,Ahmad; Movadhedin,Mohammad Reza, Apparatus and method for a low-rate data transmission mode over a power line.
Takemoto Sohei (Fremont CA) Pasdera Leonard A. (San Carlos CA), Apparatus and method for encoding and decoding attribute data into error checking symbols of main data.
Croushore Timothy M. ; Guyker William C. ; Curt Walter M. ; Shomo ; III Glen K. ; Mullins Chris F. ; Childers ; IV James M., Apparatus and method for implementing digital communications on a power line.
Just, Michael K.; Van Oorschot, Paul, Apparatus and method for reducing transmission bandwidth and storage requirements in a cryptographic security system.
Patrick Michael W. ; Picker Dennis J. ; Perreault John A., Apparatus, method, system and system method for distributed routing in a multipoint communication system.
Mobley,Joseph Graham; Ao,Jiening; Blashewski,Steven E.; Farcas,Florin; Ritchie, Jr.,John A.; West, Jr.,Lamar E., Automatic frequency control of multiple channels.
Vijayan Rajiv ; Odenwalder Joseph P. ; Wolf Jack K. ; Lee Chong U. ; Zehavi Ephraim,ILX, Bit interleaving for orthogonal frequency division multiplexing in the transmission of digital signals.
Yonge, III, Lawrence W.; Katar, Srinivas; Petranovich, James E.; Riedel, Neal; Peponides, George M.; Chan, Wai Chung, Communicating in a network that includes a medium having varying transmission characteristics.
Yonge, III, Lawrence W.; Katar, Srinivas; Petranovich, James E.; Riedel, Neal; Peponides, George M.; Chan, Wai Chung, Communicating in a network that includes a medium having varying transmission characteristics.
Grube Gary W. ; Shaughnessy Mark L. ; Norwood Steven E. ; Felderman William A., Communication system to communication system gateway method and apparatus.
Calvignac Jean (LaGaude FRX) Dauphin Michel (Vence FRX) Lenoir Raymond (Vence FRX) Picard Jean-Louis (LaColle sur Loup FRX), Data integrity securing means.
Castelain M. Damien (Rennes FRX) Helard M. Jean-Francois (Rennes FRX) Le Floch M. Bernard (Rennes FRX) Rault M. Jean-Christophe (Rennes FRX), Device for the coherent demodulation of time-frequency interlaced digital data, with estimation of the frequency respons.
Halbert-Lassalle Roselyne (Rennes) Helard Jean-Francois (Rennes) Le Floch Bernard (Rennes FRX), Device for the transmission of digital data with at least two levels of protection and corresponding reception device.
Chouly Antoine (Paris FRX) Brajal Amrico (Villeneuve Le Roi FRX), Digital signal transmission system based on partitioning of a coded modulation with concatenated codings.
Tanaka Shigetaka (Atsugi JPX) Saito Yuichi (Hadano JPX), Digital transmission device having an error correction mode and method for shifting down a data transmission rate.
Heer Daniel N. ; Rance Robert J., Encrypting method and apparatus enabling multiple access for multiple services and multiple transmission modes over a broadband communication network.
Lawrence W. Yonge, III ; Bart W. Blanchard ; Harper Brent Mashburn ; Timothy Robert Gargrave ; William Edward Lawton, Forward error correction with channel adaptation.
Matyas Stephen M. (Manassas VA) Johnson Donald B. (Manassas VA) Le An V. (Manassas VA) Prymak Rostislaw (Dumfries VA) Wilkins John D. (Somerville VA) Martin William C. (Concord NC) Rohland William S., Hybrid public key algorithm/data encryption algorithm key distribution method based on control vectors.
Katar, Srinivas; Yonge, III, Lawrence W.; Riedel, Neal K.; Wang, Min; Peponides, George M.; Chan, Wai Chung; Gavette, Sherman Leon; Ayyagari, Deepak, Managing contention-free time allocations in a network.
Sambamurthy Namakkal S. ; Tripathi Devendra K. ; Deb Alak K. ; Truong Linh Tien ; Kumar Praveen D., Media access control architectures and network management systems.
Yonge, III,Lawrence W.; Markwalter,Brian E.; Kostoff, II,Stanley J.; Patella,James Philip; Earnshaw,William E., Media access control protocol with priority and contention-free intervals.
Gfeller Fritz Rudolf,CHX ; Hortensius Peter Dirk ; Kam Patrick K.,CAX ; Kermani Parviz ; McKay Danny N.,CAX ; Naghshineh Mahmoud ; Olsen Claus Michael ; Rezvani Babak, Media access control protocols in a wireless communication network supporting multiple transmission rates.
Sambamurthy Namakkal S. ; Tripathi Devendra K. ; Deb Alak K. ; Truong Linh Tien ; Kumar Praveen D., Media access control receiver and network management system.
Yonge, III, Lawrence W.; Katar, Srinivas; Kostoff, II, Stanley J.; Earnshaw, William E.; Blanchard, Bart W.; Gargrave, Timothy R., Medium access control layer that encapsulates data from a plurality of received data units into a plurality of independently transmittable blocks.
Bauchot Frederic Jacques (St. Jeannet FRX) Lefevre Frederic Bernard (Cagnes sur Mer FRX) Revardel Luc Louis (La Gaude FRX), Medium access control scheme for wireless LAN using a variable length interleaved time division frame.
Perreault John A. ; Joshi Abhay ; Kabatepe Mete ; Lloyd Lawrence W. ; Schroeder Stephen, Method and apparatus for a hybrid limited contention and polling protocol.
Sherer William P. (Sunnyvale CA) Gahan Richard A. (Wexford IEX) Hickey John F. (Tipperary IEX), Method and apparatus for avoiding packet loss on a CSMA/CD-type local area network using receive-sense-based jam signal.
Shimon Muller ; Denton E. Gentry, Jr. ; Linda T. Cheng ; John E. Watkins, Method and apparatus for data re-assembly with a high performance network interface.
Stratton Gregory C. ; Brackett Charles Cameron ; Johnson Chandler A., Method and apparatus for feature configuration in remotely located ultrasound imaging system.
Schmahl Kenneth A. ; Tedone Matthew J. ; Schell John C. ; Karminsky Igor ; Chan Ray P., Method and apparatus for passing bus mastership between processors using predefined bus mastership states.
Jeffrey B. Mendelson ; K. Martin Stevenson, III ; Mowaffak T. Midani ; Marcus A. Maranhao ; Michael J. Donahue ; Jean Francois Van Kerckhove ; Wayne R. Roiger, Method and apparatus for supporting a connectionless communication protocol over an ATM network.
Ben-Michael Siman-Tov (Jerusalem ILX) Lozowick Philip P. (Jerusalem MA ILX) Hawe William (Pepperell MA) Lampson Butler (Cambridge MA), Method and apparatus for traffic congestion control in a communication network bridge device.
Zijderhand Frans (Eindhoven NLX), Method and arrangement for channel allocation for data transmission between a main station and a plurality of substation.
Cain, Joseph Bibb; Billhartz, Thomas Jay, Method and device for establishing communication links and detecting interference between mobile nodes in a communication system.
Lagoutte Pierre,FRX ; Grenot Thierry,FRX, Method and device for the control of congestion in sporadic exchanges of data packets in a digital transmission network.
Pommier Daniel (Breal sous Montfort FRX) Alard Michel (Rennes FRX), Method and installation for digital communication, particularly between and toward moving vehicles.
Yonge, III, Lawrence W.; Markwalter, Brian E.; Kostoff, II, Stanley J.; Patella, James Philip; Earnshaw, William E., Method and protocol to support contention-free intervals and QoS in a CSMA network.
Bultman, Michael J.; Cook, Robert W.; Looke, Richard C.; Moses, Jr., Charley D.; Sorrells, David F., Method and system for ensuring reception of a communications signal.
Logvinov,Oleg; Walvis,Dirk; Durfee,Lawrence F., Method and system for timing controlled signal transmission in a point to multipoint power line communications system.
Kopp,Lowell Ellis, Method and system to increase the throughput of a communications system that uses an electrical power distribution system as a communications pathway.
Marturano Lawrence J. (Mount Prospect IL) Needham Michael L. (Palatine IL) Crisler Kenneth J. (Wheaton IL), Method for eliminating a receiving data unit as a source of excessive resend requests.
Ptasinski,Henry S.; Trachewsky,Jason Alexander; Mallory,Tracy D., Method for providing dynamic adjustment of frame encoding parameters in a frame-based communications network.
Bagchi, Amit G.; Ojard, Eric; Ptasinski, Henry S.; Trachewsky, Jason Alexander, Method for selecting frame encoding parameters to improve transmission performance in a frame-based communications network.
Le Floch Bernard (Rennes FRX) Rault Jean-Christophe (Rennes FRX) Pommier Daniel (Breal Sous Montfort FRX) Castelain Damien (Rennes FRX), Method for the broadcasting of digital data, notably for radio broadcasting at a high bit-rate towards mobile receivers,.
Helard Jean-Francois (Rennes FRX) Lemesle Jean-Michel (Rennes FRX) Halbert-Lassalle Roselyne (Rennes FRX) Le Floch Bernard (Rennes FRX), Method for the broadcasting of digital data, notably for radio broadcasting at high bit rate towards mobile receivers, w.
Rahuel Jean-Claude (Rennes FRX) Pommier Daniel (Rennes FRX), Method for the transmission of digital data in radio paging systems and corresponding radio paging receiver.
Tadhg Creedon IR; David J. Law GB; Terence D. Lockyer GB; Nigel Horspool BE, Method for transmitting multimedia packet data using a contention-resolution process.
Kaufman Charles W. (Northborough MA) Herbison B. J. (Clinton MA), Method for utilizing an encrypted key as a key identifier in a data packet in a computer network.
Romans, Christopher Gwyn; Gaiot, Louis Mario; Negus, Kevin James; Tourrilhes, Jean; Morris, Paul John; Gawera, Rajinder, Method of communicating first and second data types.
Cidon Israel (Haifa NC ILX) Doney Richard M. (Durham NC) Drake ; Jr. John E. (Pittsboro NC) Hervatic Elizabeth A. (Apex NC) Potter ; Jr. Kenneth H. (Raleigh NC) Tedijanto Theodore E. (Cary NC), Method of determining whether to use preempt/resume or alternate protocol for data transmission.
Bux Werner K. (Richterswil NY DEX) Dias Daniel M. (Mahopac NY) Goyal Ambuj (Amawalk NY), Method of providing priority access to a transmission communication ring.
Fischer,Matthew James; Mallory,Tracy D., Method of providing synchronous transport of packets between asynchronous network nodes in a frame-based communications network.
Kaiser Stefan,DEX ; Fazel Khaled,DEX, Method of simultaneous radio transmission of digital data between a plurality of subscriber stations and a base station.
Takiyasu Yoshihiro (Higashimurayama JPX) Amada Eiichi (Tokyo JPX) Jusa Hidehiko (Higashimurayama JPX) Ishifuji Tomoaki (Tokyo JPX) Adachi Shuichi (Hadano JPX) Ishii Genichi (Hachioji JPX), Method of wireless communication between base station and mobile station and multiple access communication system.
Ruszczyk Chester A. (South Boston MA) Gun Levent (Hopkinton MA), Method, device and router for providing a contention-based reservation mechanism within a mini-slotted dynamic entry pol.
Dutta Santanu, Methods of dynamically switching return channel transmissions of time-division multiple-access (TDMA) communication systems between signalling burst transmissions and message transmissions.
Paul Marie Pierre Spruyt BE; Frank Octaaf Van der Putten BE; Peter Paul Frans Reusens BE, Modulation/demodulation of a pilot carrier, means and method to perform the modulation/demodulation.
Mikael Isaksson SE; Magnus Johansson SE; Harry Tonvall SE; Lennart Olsson SE; Tomas Stefansson SE; Hans Ohman SE; Gunnar Bahlenberg SE; Anders Isaksson SE; Goran Okvist SE; Lis-Marie Ljunggr, Multi-carrier transmission systems.
Bang Seung Chan,KRX ; Shim Jae Ryong,KRX ; Han Ki Chul,KRX ; Kim Jung Im,KRX ; Kim Tae Joong,KRX, Orthogonal complex spreading method for multichannel and apparatus thereof.
He,Xiaoning; Funato,Daichi, Point coordinator control passing scheme using a scheduling information parameter set for an IEEE 802.11 wireless local area network.
Huth, Hans-Peter, Process for transmitting data packets of predefinable priority classes using ethernet from a first device to at least one other device.
Yonge, III, Lawrence W.; Markwalter, Brian E.; Kostoff, II, Stanley J.; Patella, James Philip; Earnshaw, William E., Segment bursting with priority pre-emption and reduced latency.
Gregg Thomas Anthony ; Pandey Kulwant Mundra, Speeding-up communication rates on links transferring data structures by a method of handing scatter/gather of storage b.
Vander Mey James E. (Ocala FL) Vander Mey Timothy J. (Ocala FL), Spread spectrum communication system particularly-suited for RF network communication.
Perreault John A. (Hopkinton MA) Joshi Abhay (Norwood MA) Kabatepe Mete (Norwood MA) Lloyd Lawrence W. (Wrentham MA) Schroeder Stephen (Stoughton MA), System and method for hybrid contention/polling protocol collision resolution using a depth first search technique.
Fulthorp Richard J. ; Smith Dale K. ; Fulthorp David A. ; Donich Thomas G., System and method for the efficient control of a radio communications network.
Joshi Abhay ; Kabatepe Mete ; Lloyd Lawrence W. ; Perreault John A. ; Schroeder Stephen, System for determining the frequency of repetitions of polling active stations relative to the polling of inactive stations.
Yonge, III, Lawrence W.; Katar, Srinivas; Vandermey, Timothy J.; Petranovich, James E.; Riedel, Neal K.; Peponides, George M.; Gavette, Sherman Leon, Time synchronization in a network.
Yonge, III, Lawrence W.; Katar, Srinivas; Vandermey, Timothy J.; Petranovich, James E.; Riedel, Neal K.; Peponides, George M.; Gavette, Sherman Leon, Time synchronization in a network.
Fischer Michael A. (San Antonio) Cox William M. (San Antonio) Moschner John L. (San Antonio) Nuckols James H. (Houston TX), Uneven token distribution technique for token based local area network.
Gray James P. ; Onvural Raif O. ; Peyravian Mohammad, Use of marker packets for synchronization of encryption/decryption keys in a data communication network.
Johnson Dennis F.,CAX ; Wiebe Michael,CAX ; Holowick Erwin,CAX ; Jacob Nathan R.,CAX ; Murphy Michael F.,CAX ; Schellenberg James J.,CAX ; Stasenski Michael S.,CAX, Wide area communications network for remote data generating stations.
Watanabe,Yoshinori; Kobayashi,Hirokazu; Doi,Hiroshi, Wireless network system and communication method employing both contention mode and contention-free mode.
McKenna Daniel B. (Broomfield CO) Jochim Kenneth J. (Boulder CO) Shepard Donald N. (Lafayette CO) Bradway Kevin B. (Longmont CO), Wireless radio packet switching network.
Yonge, III, Lawrence Winston; Katar, Srinivas; Kostoff, II, Stanley Joseph; Earnshaw, William Edward; Blanchard, Bart W.; Gargrave, Timothy R., Medium access control layer that encapsulates data from a plurality of received data units into a plurality of independently transmittable blocks.
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