Pulse or digital communications – Repeaters – Testing
Patent
1995-11-06
1998-10-20
Ghebrietinsae, Temesghen
Pulse or digital communications
Repeaters
Testing
370203, 371 30, H04B 169, H04J 1100
Patent
active
058258078
ABSTRACT:
A method and system are provided for the synchronous transmission and reception of multiplexed digital signals such as spread spectrum. The system uses biorthogonal modulation of a plurality of orthogonal signals, preferably wideband, together with simultaneous orthogonal multiplexing. The method is found to significantly mitigate the crosscorrelation interference that is caused by the interaction between the multiplexed signals. The system transmits a lesser number of multiplexed orthogonal signals than would be required in the corresponding antipodal system, thereby reducing the crosscorrelation interference, while maintaining the same information throughput. The bit error rate of the system is reduced. The method combines aspects of unequal error protection (UEP) error correction coding (ECC) with a receiver architecture for biorthogonal signals. The system exhibits a signal-to-noise ratio (SNR) improvement in the detection of some fraction of the encoded digital data bits. This facilitates the use of additional error control redundancy in the remaining data bits, which results in an overall improvement in the decoded error rate performance.
REFERENCES:
patent: 2941202 (1960-06-01), Harris, Jr. et al.
patent: 4247943 (1981-01-01), Malm
patent: 4301530 (1981-11-01), Gutleber
patent: 4460992 (1984-07-01), Gutleber
patent: 4472815 (1984-09-01), Gutleber
patent: 4475214 (1984-10-01), Gutleber
patent: 4494228 (1985-01-01), Gutleber
patent: 4587662 (1986-05-01), Langewellpott
patent: 4680777 (1987-07-01), Saha
patent: 4700363 (1987-10-01), Tomlinson et al.
patent: 4730340 (1988-03-01), Frazier, Jr.
patent: 4730344 (1988-03-01), Saha
patent: 5063560 (1991-11-01), Yerbury et al.
patent: 5081643 (1992-01-01), Schilling
patent: 5081645 (1992-01-01), Resnikoff et al.
patent: 5184135 (1993-02-01), Paradise
patent: 5204874 (1993-04-01), Falconer et al.
patent: 5214656 (1993-05-01), Chung et al.
patent: 5216693 (1993-06-01), Nakamura
patent: 5235614 (1993-08-01), Bruckert et al.
patent: 5278844 (1994-01-01), Murphy et al.
patent: 5282019 (1994-01-01), Basile et al.
patent: 5282222 (1994-01-01), Fattouche et al.
patent: 5305352 (1994-04-01), Calderbank et al.
patent: 5315583 (1994-05-01), Murphy et al.
patent: 5327455 (1994-07-01), Degaudenzi et al.
patent: 5327496 (1994-07-01), Russell et al.
patent: 5347536 (1994-09-01), Meehan
patent: 5371760 (1994-12-01), Allen et al.
patent: 5377194 (1994-12-01), Calderbank
patent: 5379320 (1995-01-01), Fernandes et al.
patent: 5390207 (1995-02-01), Fenton et al.
patent: 5412620 (1995-05-01), Cafarella et al.
patent: 5414729 (1995-05-01), Fenton
patent: 5425050 (1995-06-01), Schreiber et al.
patent: 5428818 (1995-06-01), Meidan et al.
patent: 5469452 (1995-11-01), Zehavi
patent: 5546420 (1996-08-01), Seshadri et al.
patent: 5592471 (1997-01-01), Briskman
patent: 5615227 (1997-03-01), Schumacher, Jr. et al.
"A New Multilevel Coding Method Using Error Correcting Codes," IEEE Transactions on Information Theory, vol. 23, No. 3, pp. 371-377, May, 1977 by H. Imai and S. Hirakawa.
"Multilevel Codes Based on Partitioning", IEEE Transactions on Information Theory, vol. 35, No. 1, pp. 87-98; Jan. 1989 by G. J. Pottie and D. P. Taylor.
"Multistage Coding and Decoding for a M-PSK System", IEEE Globecom '90, Dec. 2-5, 1990, San Diego, CA, pp. 698-703, by T. Woerz and J. Hagenauer.
"Multilevel Trellis Coded Modulations for the Rayleigh Fading Channel", IEEE Transactions on Communications, vol. 41, No. 9, pp. 1300-1310, Sep., 1993, by N. Seshadri and C.E.W. Sundberg.
"Performance Analysis of a Multilevel Coded Modulation System", IEEE Transactions on Commumications, vol. 42, No. 2/3/4, pp. 299-312, Feb./Mar./Apr. 1994, by Y. Kofman, E. Zehavi, and S. Shamai.
"Highly Reliable Multilevel Channel Coding System Using Binary Convolutional Codes", Electronics Letters, vol. 23, No. 18, pp. 939-941, Aug. 1987, by K. Yamaguchi and H. Imai.
"Reed-Solomon Coding Performance with Errors and Erasures Decoding on a Rayleigh Fading Channel" by Paul J. Crepeau and Karen W. Halford, IEEE, Proceedings of Milcom '94, pp. 1023-1026, 1994.
Modern Communications and Spread Spectrum, by G.R. Cooper and C.D. McGillem, NY; McGraw-Hill, Inc., 1986, p. 215 and pp. 233-235.
"Trellis-Coded Direct-Sequence Spread-Spectrum Communications" by B. D. Woerner and W. E. Stark, IEEE Transactions on Communications, vol. 42, No. 12 pp. 3161-3170, Dec. 1994.
"COFDM: An Overview", by W. Y. Zou and Y. Wu, IEEE Transactions of Broadcasting, vol. 41, No. 1, pp. 1-8, Mar. 1995.
"Theory of Spread-Spectrum Communications--A Tutorial" by R. L. Pickholtz and D. L. Schilling and L. B. Milstein, IEEE Transactions and Communications, vol. 30, No. 5, pp. 855-884, May, 1982.
"Crosscorrelation Properties of Pseudorandom Sequences", by D.V. Sarwate and M.B. Pursley, Proceedings of the IEEE, vol. 68, No. 5, pp. 593-619, May 1980.
"An Efficient Channel Coding Scheme for Direct Sequence CDMA Systems", by S. L. Miller, Proceedings of Milcom '91, pp. 1249-1253, 1991.
"Recent Spreading Codes for Spread-Spectrum Communications Systems", by S. Tachikawa, Electronics and Communications in Japan, Part 1, vol. 75, No. 6, pp. 41-49, Jun. 1992.
"Convolutional Codes and Their Perfomance in Communications Systems", by A. J. Viterbi, IEEE Transactions and Communications, vol. 19, No. 5, pp. 751-722, Oct. 1971.
Modern Quadrature Amplitude Modulation, by W. T. Webb and L. Hanzo, London: Pentech Press, Ltd., 1994, pp. 266-268.
"A Performance Comparison of the Binary Quadratic Residue Codes with the 1/2-Rate Convolutional Codes", by X. Chen, I.S. Reed and T.K. Truong, IEEE Transactions on Information Theory, vol. 40, No. 1, pp. 126-136, Jan. 1994.
"Realization of Optimum Interleavers," by J. L. Ramsey, IEEE Transactions on Information Theory, vol. 16, No. 3, pp. 338-345, May 1970.
Modern Communications and Spread Spectrum, by G. R. Cooper and C. D. McGillem, NY: McGraw-Hill, Inc., 1986, p. 159, pp. 206-209, pp. 423-425.
Introduction to Convolutional Codes with Applications, by A. Dholakia, Dordrecht: Kluwer Acad. Pub., 1994, pp. 104-108.
"Bounds and Approximations for the BIT Error Probability of Convolutional Codes," by A.G. Burr, Electronics Letters, vol. 29, No. 14, 1287-1288, Jul. 1993.
"Robustly Optimal Rate One-Half Convolutional Codes," by R. Johannesson, IEEE Transactions on Information Theory, vol. 21, No. 4, pp. 464-468, Jul. 1975.
Telecommunication Systems Engineering, by W. C. Lindsey and M.K. Simon, Englewood Cliffs, NJ: Prentice Hall, Inc., 1973, pp. 188-194, p. 198, pp. 210-225, p. 253, pp. 266-269, pp. 272-277, pp. 235-240.
"ISO-MPEG-1 Audio: A Generic Standard for Coding of High-Quality Digital Audio" by K. Brandenburg and G. Stoll, Journal of the Audio Engineering Society, vol. 42, No. 10, pp. 780-792, Oct. 1994.
ISO/IEC 11172-1/2/3, "Information Technology--Coding of Moving Pictures and Associated Audio for Digital Storage Media at up to About 1/5 Mbit/s," Geneva, Switzerland, pp. 140-142, 1993.
"Short Convolutional Codes with Maximal Free Distance for Rates 1/2, 1/3 and 1/4," by K. L. Larsen, IEEE Transactions on Information Theory, vol. 19, No. 3, pp. 371-372, May 1973.
"New Short Constraint Length Convolutional Code Constructions for Selected Rational Rates," by D. G. Daut, J.W. Modestino, and L.D. Wismer, IEEE Transactions on Information Theory, vol. 28, No. 5, pp. 794-800, Sep. 1982.
"Constructions on Rate (n-1)
Punctured Convolutional Codes with Minimum Required SNR Criterion," by P.J. Lee, IEEE Transactions on Communications, vol. 36, No. 10, pp. 1171-1174, Oct. 1988.
"New Rate-Compatible Punctured Convolutional Codes for Viterbi Decoding", L.H.C. Lee, IEEE Transactions on Communications, vol. 42, No. 12, pp. 3073-3079, Dec. 1994.
"Error Correction Capabilities of Binary Mapped Reed-Solomon Codes with Parity BITS Appended to all Symbols," by C.C. Hsu, I.S. Reed, and T.K. Truong, IEEE Proceedings--Communications, vol. 141, No. 4, pp. 209-211, Aug. 1994.
"Synthesis of Band-Limited Orthogonal Signals for Multichannel Data Transmission," by R.W. Chang, The Bell System Technical Journal, vol. 45, pp. 1775-1796, Dec.
Ghebrietinsae Temesghen
Rhoa Joseph A.
LandOfFree
System and method for multiplexing a spread spectrum communicati does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for multiplexing a spread spectrum communicati, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for multiplexing a spread spectrum communicati will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-253459