Method and apparatus for signal transmission and reception
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04B-001/38
H04L-005/16
출원번호
US-0744345
(2003-12-23)
발명자
/ 주소
Miller, William J.
출원인 / 주소
Broadband Physics, Inc.
대리인 / 주소
Weingarten, Schurgin, Gagnebin &
인용정보
피인용 횟수 :
3인용 특허 :
35
초록▼
A method for communicating serial input data over a transmission link. Serial input data is partitioned into parallel data elements and is coded prior to rotation by an invertible linear mapping. Resulting frames of parallel sign elements are transmitted over the link. After receipt from the link, t
A method for communicating serial input data over a transmission link. Serial input data is partitioned into parallel data elements and is coded prior to rotation by an invertible linear mapping. Resulting frames of parallel sign elements are transmitted over the link. After receipt from the link, the signal is assembled into frames of parallel signal elements which are de-rotated by an inverse linear mapping, then decoded. Thresholding the result of the inverse mapping recovers the parallel data elements, which are then re-assembled into serial output data. The linear mapping employs: 1) commuting rotation matrices for convolutionally rotating data vectors into signal vectors and vice-versa; 2) filter bank polyphase rotation matrices; or 3) computationally efficient multi-rate wavelet filter banks. Coefficients of the rotation matrix of the receiver are adaptively equalized to correct for transmission path distortion.
대표청구항▼
1. A system for transmitting a first data stream over a transmission medium in conjunction with a second signal, comprising:a first coder for receiving the first data stream on a plurality of channels thereof, for coding the first data stream, and for providing parallel, coded output data samples; a
1. A system for transmitting a first data stream over a transmission medium in conjunction with a second signal, comprising:a first coder for receiving the first data stream on a plurality of channels thereof, for coding the first data stream, and for providing parallel, coded output data samples; a first synthesizer, in communication with the first coder, for assembling the parallel, coded output data samples into sequences of data frames each comprising a plurality of data coordinates, for converting each frame of data coordinates into orthogonal frames of signal coordinates using an invertible transformation, and for sequentially providing the signal coordinates as a first signal representation of the first data stream; and a summing circuit, in communication with the first synthesizer, for combining the first signal representation of the first data stream with the second signal and for coupling the resulting combination signal to the transmission medium. 2. The system of claim 1, wherein the first coder is operative to implement direct sequence coding with the first data stream.3. The system of claim 1, wherein the second signal is selected from the group consisting of a voice signal, a television signal, and a facsimile signal.4. The system of claim 1, further comprising:a second coder for receiving a second data stream on a plurality of channels thereof, for coding the second data stream, and for providing parallel, coded output data samples; a second synthesizer, in communication with the second coder, for assembling the parallel, coded output data samples into sequences of data frames each comprising a plurality of data coordinates, for converting each frame of data coordinates into orthogonal frames of signal coordinates using an invertible transformation, and for sequentially providing the signal coordinates as the second signal to the summing circuit, wherein the code sequence employed for coding in the second coder is orthogonal to that employed for coding in the first coder. 5. The system of claim 4, wherein the second coder is operative to implement direct sequence coding with the second data stream.6. The system of claim 1, wherein the first coder employs a code sequence having large auto-correlation and small cross-correlation.7. The system of claim 6, wherein the first coder employs a code sequence selected from the group consisting of JPL, Gold, and Walsh codes.8. The system of claim 1, wherein the first synthesizer is provided as a tree synthesizer and the parallel, coded output data samples have the same bit rate.9. The system of claim 1, wherein the first synthesizer is implemented as a rotation matrix for providing the invertible transformation from data coordinates to signal coordinates.10. The system of claim 9, wherein the rotation matrix is comprised of a filter bank polyphase rotation matrix for providing the invertible transformation of the parallel, coded output data samples.11. The system of claim 10, wherein the filter bank polyphase rotation matrix comprises a multi-rate wavelet synthesizer filter bank for synthesizing the parallel, coded output data samples into the first signal.12. The system of claim 1, wherein the first synthesizer is comprised of a baseband modulator.13. The system of claim 1, further comprising:an input filter for receiving an analog representation of the first data stream and for providing Nyquist filtering thereto; and an analog-to-digital converter, in communication with the input filter, for converting the analog representation of the first data stream to a digital representation of the first data stream and for coupling the digital representation of the first data stream to the first coder. 14. The system of claim 13, further comprising a signal conditioning circuit intermediate the input filter and the analog-to-digital converter.15. The system of claim 1, further comprising:a digital-to-analog converter for receiving the first signal representation of the first data stream in digital format from the first synthesizer and for providing the first signal representation of the first data stream in analog format; and an output filter, in communication with the digital-to-analog converter, for providing Nyquist filtering thereto prior to providing the first signal representation of the first data stream to the summing circuit. 16. The system of claim 14, further comprising a signal conditioning circuit intermediate the digital-to-analog converter and the output filter.17. The system of claim 1, further comprising a transmitter for transmitting the combined signal over the transmission medium.18. The system of claim 1, wherein the summing circuit further comprises at least one tertiary input in communication with a respective tertiary signal source for combining the at least one tertiary signal with the first signal representation of the first data stream and the second signal.19. A system for extracting a first data stream from a combined signal comprised at least of first and second signals and received from a transmission medium, the system comprising:a signal tap in communication with the transmission medium for coupling the combined signal to each of first and second outputs; a first analyzer, in communication with the first output of the signal tap, for assembling sequential frames of signal coordinates associated with the first signal in the combined signal and for converting frames of signal coordinates into respective ones of orthogonal frames of parallel data coordinates associated with the first signal using an invertible transformation; a first decoder, in communication with the first analyzer, for receiving each frame of parallel data coordinates on a like number of channels thereof, for decoding the frames, and for collectively providing the decoded frames of parallel data coordinates from the decoder channels as the first data stream; and a receiver, in communication with the second output of the signal tap, for receiving the second signal in the combined signal, wherein the invertible transformation implemented by the first analyzer is the inverse of a transformation performed on data in defining the first signal. 20. The system of claim 19, wherein the first decoder is operative to implement direct sequence decoding with the first data stream.21. The system of claim 19, wherein the second signal is selected from the group consisting of a voice signal, a television signal, and a facsimile signal.22. The system of claim 19, wherein the receiver comprises:a second analyzer, in communication with the second output of the signal tap, for assembling sequential frames of signal coordinates associated with the second signal in the combined signal and for converting frames of signal coordinates into respective ones of orthogonal frames of parallel data coordinates associated with the second signal using an invertible transformation; and a second decoder, in communication with the second analyzer, for receiving the frames of parallel data coordinates on a like number of channels thereof, for decoding therewith, and for collectively providing the decoded frames of parallel data coordinates from the decoder channels as a second data stream, wherein the invertible transformation implemented by the second analyzer is the inverse of a transformation performed on data in defining the second signal, and wherein the code sequence employed for direct sequence decoding in the second decoder is orthogonal to that employed for direct sequence decoding in the first decoder. 23. The system of claim 22, wherein the second decoder is operative to implement direct sequence decoding with the second data stream.24. The system of claim 19, wherein the first decoder employs a code sequence having large auto-correlation and small cross-correlation.25. The system of claim 24, wherein the first decoder employs a code sequence selected from the group consisting of JPL, Gold, and Walsh codes.26. The system of claim 19, wherein the first analyzer is implemented as a rotation matrix for providing the invertible transformation from signal coordinates to data coordinates.27. The system of claim 26, wherein the rotation matrix is comprised of a filter bank polyphase rotation matrix for providing the invertible transformation from signal coordinates to data coordinates.28. The system of claim 27, wherein the filter bank polyphase rotation matrix comprises a multi-rate wavelet analyzer filter bank for analyzing the signal coordinates.29. The system of claim 19, wherein the first analyzer is comprised of a baseband demodulator.30. The system of claim 19, further comprising:an input filter for receiving an analog representation of the combined signal from the signal tap and for providing Nyquist filtering thereto; and an analog-to-digital converter, in communication with the input filter, for converting the filtered analog representation of the combined signal to a digital representation of the combined signal and for coupling the digital representation of the combined signal to the first analyzer. 31. The system of claim 30, further comprising a signal conditioning circuit intermediate the input filter and the analog-to-digital converter.32. The system of claim 19, further comprising:a digital-to-analog converter for receiving the first data stream in digital format from the first decoder and for providing the first data stream in analog format; and an output filter, in communication with the digital-to-analog converter, for providing Nyquist filtering to the analog first data stream. 33. The system of claim 32, further comprising a signal conditioning circuit intermediate the digital-to-analog converter and the output filter.34. The system of claim 19, wherein the receiver comprises a signal processor for decoding the combined signal from the second output of the signal tap.35. A method of sending and receiving a first data stream in conjunction with at least one second signal, comprising:applying the first data stream to each of plural channels of a coder; coding the parallel first data streams to provide parallel, coded output samples; synthesizing the parallel, coded output samples by assembling the parallel, coded output samples into sequences of data frames each comprising a plurality of data coordinates, converting each frame of data coordinates into orthogonal frames of signal coordinates using an invertible transformation, and sequentially providing the signal coordinates as a first signal representation of the first data stream; summing the first signal representation of the first data stream with the at least one second signal in a summing circuit to form a combined signal; transmitting the combined signal across a transmission medium using a transmitter; receiving the combined signal from the transmission medium using a receiver; analyzing the combined signal by assembling sequential frames of signal coordinates associated with the first signal in the combined signal and converting frames of signal coordinates into respective ones of orthogonal frames of parallel data coordinates associated with the first signal using an invertible transformation; and decoding the frames of parallel data coordinates using a decoder having a like number of channels, and collectively providing the decoded frames of parallel data coordinates from the decoder channels as the received first data stream, wherein the invertible transformations of the synthesizing step and of the analyzing step are mutually inverse, and wherein the code sequences of the coding and decoding steps have large auto-correlation. 36. The method of claim 35, wherein the step of applying further comprises applying the first data stream to each of plural channels of a direct sequence coder.37. The method of claim 35, wherein the at least one second signal of the combined signal is the product of performing the applying, coding, and synthesizing steps on a second data stream.38. The method of claim 35, further comprising the steps of executing the analyzing and decoding steps with respect to the at least one second signal of the combined signal for providing a received second data stream.39. The method of claim 35, wherein the step of using an invertible transformation of the synthesizing and analyzing steps comprises using a rotation matrix.40. The method of claim 39, wherein using a rotation matrix comprises using a filter bank polyphase rotation matrix.41. The method of claim 40, wherein using a filter bank polyphase rotation matrix comprises using a multi-rate wavelet synthesizer filter bank.42. The method of claim 35, further comprising, prior to the step of applying, the steps of:input filtering an analog representation of the first data stream by applying Nyquist filtering thereto; and converting the filtered, analog representation of the first data stream to a filtered, digital representation of the first data stream for input to the coder. 43. The method of claim 42, further comprising the step of preconditioning the filtered, analog representation of the first data stream prior to the step of converting.44. The method of claim 35, further comprising, prior to the step of analyzing, the steps of:input filtering the combined signal by applying Nyquist filtering thereto; and converting the filtered, combined signal to a digital representation of the filtered combined signal for input to the analyzer. 45. The method of claim 44, further comprising the step of preconditioning the filtered, combined signal prior to the step of converting.46. The method of claim 35, further comprising, prior to the step of summing, the steps of:converting the first signal representation of the first data stream from digital to analog form; and output filtering the analog first signal representation of the first data stream by applying Nyquist filtering thereto. 47. The method of claim 46, further comprising the step of preconditioning the analog first signal representation of the first data stream prior to the step of output filtering.48. The method of claim 35, further comprising, after the step of decoding, the steps of:converting the received first data stream from digital to analog form; and output filtering the analog form of the first data stream by applying Nyquist filtering thereto. 49. The method of claim 48, further comprising the step of preconditioning the analog received first data stream prior to the step of output filtering.
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