OFDM/DMT/ digital communications system including partial sequence symbol processing
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04J-011/00
H04L-027/26
출원번호
US-0883916
(2004-07-02)
등록번호
US-8547823
(2013-10-01)
발명자
/ 주소
Marchok, Daniel J.
Younce, Richard C.
Melsa, Peter J. W.
출원인 / 주소
Tellabs Operations, Inc.
대리인 / 주소
Hamilton, Brook, Smith & Reynolds, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
176
초록
A method of managing a signal over a symbol period includes supplying samples of the signal at beginning and end portions of the symbol period. The method further includes suppressing the supply of samples of the signal at a middle portion of the symbol period.
대표청구항▼
1. A method of managing a symbol, represented by a plurality of samples over a symbol time period, in a digital communications system, the method comprising: causing, in a processing unit, a first subset of the plurality of samples corresponding to beginning and end portions of the symbol to be supp
1. A method of managing a symbol, represented by a plurality of samples over a symbol time period, in a digital communications system, the method comprising: causing, in a processing unit, a first subset of the plurality of samples corresponding to beginning and end portions of the symbol to be supplied to a filter engine; andcausing, in the processing unit, a second subset of the plurality of samples of the symbol corresponding to a middle portion of the symbol to be bypassed around the filter engine. 2. The method of claim 1, further comprising temporarily storing the first and the second subsets of the plurality of samples. 3. The method of claim 1, further comprising filtering the first subset of the plurality of samples by the filter engine. 4. The method of claim 3, wherein filtering further includes filtering the beginning and the end portions of the symbol symmetrically. 5. The method of claim 4, wherein filtering symmetrically includes adding a sample at the beginning portion of the symbol to a corresponding symmetric sample at the end portion of the symbol. 6. The method of claim 4, wherein filtering symmetrically includes: multiplying a coefficient to a sample at the beginning portion of the symbol; andmultiplying the coefficient to a corresponding symmetric sample at the end portion of the symbol. 7. An apparatus for managing a symbol represented by a plurality of samples over a symbol time period, the apparatus comprising: a symbol buffer configured to temporarily store the plurality of samples of the symbol; anda bypass controller, connected to the symbol buffer, that causes a first subset of the plurality of samples corresponding to beginning and end portions of the symbol to be supplied to a filter engine and causes a second subset of the plurality of samples corresponding to a middle portion of the symbol to be bypassed around the filter engine. 8. The apparatus of claim 7, further comprising another symbol buffer connected to the bypass controller that temporarily stores the plurality of samples of another symbol. 9. The apparatus of claim 7, the filter engine is connected to the bypass controller. 10. The apparatus of claim 9, wherein the filter engine implements a FIR filter. 11. The apparatus of claim 9, wherein the filter engine implements a symmetric filter. 12. The apparatus of claim 9, wherein the filter engine includes symmetric taps. 13. The apparatus of claim 9, wherein the filter engine includes an adder that adds a sample at the beginning portion of the symbol to a corresponding symmetric sample at the end portion of the symbol. 14. The apparatus of claim 9, wherein the filter engine includes a multiplier that multiplies a coefficient to a sample at the beginning portion of the symbol and multiplies the coefficient to a corresponding symmetric sample at the end portion of the symbol. 15. An article of manufacture, comprising a non-transitory computer-readable medium having stored thereon computer-readable code with executable instructions to manage a symbol over a symbol time period, the computer-readable code, when executed by a processor, causes an apparatus to: cause a first subset of the plurality of samples corresponding to beginning and end portions of the symbol to be supplied to a filter engine; andcause a second subset of the plurality of samples corresponding to a middle portion of the symbol to be bypassed around the filter engine. 16. The article of manufacture of claim 15, wherein the computer-readable code, when executed by the processor, further causes the apparatus to temporarily store the first and the second subsets of the plurality of samples. 17. The article of manufacture of claim 15, wherein the computer-readable code, when executed by the processor, further causes the apparatus to filter the first subset of the plurality of samples. 18. The article of manufacture of claim 17, wherein the computer-readable code, when executed by the processor, further causes the apparatus to filter the beginning and the end portions symmetrically. 19. The article of manufacture of claim 18, wherein the computer-readable code, when executed by the processor, further causes the apparatus to, in filtering symmetrically, add a sample at the beginning portion of the symbol to a corresponding symmetric sample at the end portion of the symbol. 20. The article of manufacture of claim 18, wherein the computer-readable code, when executed by the processor, further causes the apparatus to, in filtering symmetrically: multiply a coefficient to a sample at the beginning portion of the symbol; andmultiply the coefficient to a corresponding symmetric sample at the end portion of the symbol.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (176)
Beale Terrance Ralph, AFC frequency synchronization network.
Daniel J. Marchok ; Peter J. W. Melsa ; Richard C. Younce, Apparatus and method for bandwidth management in a multi-point OFDM/DMT digital communications system.
Marchok Daniel J. ; Melsa Peter J. W. ; Younce Richard C., Apparatus and method for bandwidth management in a multi-point OFDM/DMT digital communications system.
Marchok Daniel J. ; Kapoor Samir ; Chandran Ravi, Apparatus and method for clock synchronization in a multi-point OFDM/DMT digital communications system.
Marchok, Daniel J.; Kapoor, Samir; Chandran, Ravi, Apparatus and method for clock synchronization in a multi-point OFDM/DMT digital communications system.
Marchok, Daniel J.; Kapoor, Samir; Chandran, Ravi, Apparatus and method for clock synchronization in a multi-point OFDM/DMT digital communications system.
Marchok Daniel J. ; Younce Richard C. ; Kapoor Samir ; Melsa Peter J. W., Apparatus and method for symbol alignment in a multi-point OFDM or DMT digital communications system.
Marchok, Daniel J.; Younce, Richard C.; Kapoor, Samir; Melsa, Peter J.W., Apparatus and method for symbol alignment in a multi-point OFDM/DMT digital communications system.
Chapman Joseph Quinn, Apparatus and method to allow a frame check sequence to determine the updating of adaptive receiver parameters of a high speed communication device.
Borth David E. (Palatine IL) Gerson Ira A. (Hoffman Estates IL) Smanski Philip J. (Palatine IL) Vilmur Richard J. (Palatine IL), Automatic gain selector for a noise suppression system.
Thompson John R. (La Quinta CA) Hunting C. J. (Altadena CA) Phipps William L. (Bermuda Dunes CA) Raynesford Steven J. (Cathedral City CA) Rittmueller Philip H. (St. Charles IL), Digital data cryptographic system.
Chouly Antoine (Paris FRX) Brajal Amrico (Villeneuve Le Roi FRX), Digital signal transmission system based on partitioning of a coded modulation with concatenated codings.
Baindur Ashwin ; Harvey Andrew G. ; Leung Pokman Perry ; Valencia Andrew J. ; Yiu Shoou Jiah, Dynamic bidding protocol for conducting multilink sessions through different physical termination points.
Mestdagh Denis Julien Gilles,BEX ; De Prycker Martin Louis Florence,BEX, Frequency division multiple access (FDMA) dedicated transmission system, transmitter and receiver used in such a transmi.
Grube Gary W. (Barrington IL) Markison Timothy W. (Austin TX) Pendleton Matthew A. (Cedar Park TX) Rybicki Mathew A. (Austin TX), Method and apparatus for a DMT receiver having a data de-formatter coupled directly to a constellation decoder.
Chow Peter S. (Redwood City CA) Cioffi John M. (Cupertino CA), Method and apparatus for adaptive, variable bandwidth, high-speed data transmission of a multicarrier signal over digita.
Bottomley Gregory Edward ; Dent Paul Wilkinson,SEX ; Koilpillai Ravinder David ; Chennakeshu Sandeep, Method and apparatus for bidirectional demodulation of digitally modulated signals.
Kapoor, Samir; Marchok, Daniel J., Method and apparatus for interference suppression in orthogonal frequency division multiplexed (OFDM) wireless communication systems.
Birgenheier Raymond A. (Spokane) Ryan Richard P. (Spokane WA), Method and apparatus for measuring phase accuracy and amplitude profile of a continuous-phase-modulated signal.
Molnar Peter R. ; Gleason Jeffrey P., Method and apparatus for performing frame synchronization in an asymmetrical digital subscriber line (ADSL) system.
Younce Richard C. (Wakarusa IN) Melsa Peter J. W. (South Bend IN), Method and apparatus for providing reduced complexity echo cancellation in a multicarrier communication system.
Hashimoto, Yoshitaka; Eguchi, Takeo, Method and apparatus for recording a digital information signal in parallel tracks on a record medium without guard bands between at least some adjacent tracks.
Melsa Peter J. W. ; Patton Mark ; Marchok Daniel J. ; Younce Richard C., Method and apparatus for registering remote service units in a multipoint communication system.
Ojanpera Tero (Oulu FIX) Keskitalo Ilkka (Oulu FIX), Method and apparatus for synchronizing subscriber equipment with base stations in a CDMA radio network.
Padovani Roberto (San Diego CA) Tiedemann ; Jr. Edward G. (San Diego CA) Odenwalder Joseph P. (Del Mar CA) Zehavi Ephraim (Haifa ILX) Wheatley ; III Charles E. (Del Mar CA), Method and apparatus for the formatting of data for transmission.
Greene Richard ; Rossman Mark ; Hallmark Phil, Method and apparatus for using minimal and optimal amount of SRAM delay line storage in the calculation of an X Y separa.
Grube Gary W. (Barrington IL) Markison Timothy W. (Austin TX) Pendleton Matthew A. (Cedar Park TX) Rybicki Mathew A. (Austin TX), Method and apparatus of a communications system having a DMT infrastructure.
Grabelsky,David; Borella,Michael S.; Sidhu,Ikhlaq; Nessett,Danny M., Method and system for distributed network address translation with network security features.
Plenge Georg (Thanning DEX) Schneeberger Gnter (Mnchen DEX), Method for broadcasting a digitally coded stream of data using an already occupied frequency spectrum.
Raith Alex K. (Durham NC) Persson Bengt (Djursholm SEX) Sammarco Anthony J. (Garner NC) Hoff Anders C. E. (Hagersten SEX) Diachina John W. (Garner NC) Turcotte Joseph E. (Montreal CAX) Andersson Hkan, Method for communicating in a wireless communication system.
Alamouti Siavash ; Casas Eduardo F.,CAX ; Hirano Michael ; Hoole Elliott ; Jesse Mary ; Michelson David G.,CAX ; Poon Patrick ; Veintimilla Gregory J. ; Zhang Hongliang, Method for frequency division duplex communications.
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,.
Gassmann Gerhard-Gnter (Esslingen-Berkheim DEX), Method of and system for transmitting two different messages on a carrier wave over a single transmission channel of pre.
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.
Decker Dwight W. (Cupertino CA) Anwyl Gary A. (Palo Alto CA) Dankberg Mark D. (Encinitas CA) Miller Mark J. (Vista CA) Hart Stephen R. (Encinitas CA) Jaska Kristi A. (Encinitas CA), Multi-channel trellis encoder/decoder.
Marchok Daniel J. ; Younce Richard C. ; Melsa Peter J. W., Multi-point OFDM/DMT digital communications system including remote service unit with improved receiver architecture.
Marchok Daniel J. ; Younce Richard C. ; Melsa Peter J. W., Multi-point OFDM/DMT digital communications system including remote service unit with improved transmitter architecture.
Lurey Daniel M. ; Rottinghaus Alan P. ; Rader Sheila M. ; Luz Yuda Y. ; Smith Paul F. ; Smith John M. ; Pinckley Danny T. ; Laird Kevin M. ; Kobrinetz Anthony ; Elder Robert C. ; Bailey Donald E., Multiple access digital transmitter and receiver.
Kaku Takashi,JPX ; Okita Ryoji,JPX ; Kawada Noboru,JPX, Multiplex transmission system wherein analog signal is transformed to base band, random-transformed and superimposed on dispersed signal points in vector signal space.
Marchok Daniel J. ; Kapoor Samir, Point-to multipoint digital communications system facilitating use of a reduced complexity receiver at each of the multi.
Liu Young Way ; Liu Ming-Kang ; Chen Steve ; Gross John Nicholas, Program for controlling DMT based modem using sub-channel selection to achieve scaleable data rate based on available signal processing resources.
Gudmundson Perols Leif Mikael,SEX ; Brismark Lars Gustav,SEX ; Anderson Per-Olof,SEX, Pulse shaping for data transmission in an orthogonal frequency division multiplexed system.
Takahashi Nobuaki,JPX ; Takahashi Susumu,JPX ; Sugiyama Kenji,JPX, Signal transmitting apparatus and signal receiving apparatus using orthogonal frequency division multiplexing.
Chiodini Alain,FRX ; Kumar Vinod,FRX ; Thienpont Jean-Marc,FRX, Signalling packet for communication system with reference modulated in accordance with a time-dependent law.
Keevill, Peter A; Alam, Dawood; Nolan, John M.; Collins, Matthew J; Foxcroft, Thomas; Davies, David H.; Parker, Jonathan, Single chip VLSI implementation of a digital receiver employing orthogonal frequency division multiplexing.
Agee Brian G., Stacked-carrier discrete multiple tone communication technology and combinations with code nulling, interference cancellation, retrodirective communication and adaptive antenna arrays.
Gilhousen Klein S. (San Diego CA) Jacobs Irwin M. (La Jolla CA) Padovani Roberto (San Diego CA) Weaver ; Jr. Lindsay A. (San Diego CA) Wheatley ; III Charles E. (Del Mar CA) Viterbi Andrew J. (La Jol, System and method for generating signal waveforms in a CDMA cellular telephone system.
Sierens Christiaan H. J. (Kontich BEX) Mestdagh Denis J. G. (Brussels BEX) Van Der Plas Gert (Merchtem BEX), Transceiver arrangement using TDM to transmit assigned subcarrier waveforms.
Daffara Flavio (Paris FRX) Adami Ottavio (La Spezia ITX), Transmission system and receiver for orthogonal frequency-division multiplexing signals, having a frequency-synchronizat.
Spruyt Paul Marie Pierre,BEX ; Reusens Peter Paul Frans,BEX, Transmitter with phase rotor, modulator/demodulator, communication system and method performed thereby.
Rodgers Donald E. (Moorpark CA) Chen Jacob Y. (Canoga Park CA) Padhi Prafulla K. (Agoura CA), Voice and data telephone communication system and method.
John Eric Kleider ; Michael Eugene Humphrey ; Jeffery Scott Chuprun ; Chad Scott Bergstrom ; Byron L. Tarver, Wireless communication system and method for synchronization.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.