Reduced complexity receiver for space-time- bit-interleaved...

Details Reduced complexity receiver for space-time- bit-interleaved... Reduced complexity receiver for space-time- bit-interleaved...

2006-08-22

2006-08-22

Patel, Jay K. (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S262000, C714S786000

Reexamination Certificate

active

07095812

ABSTRACT:
A system employs space-time coding characterized at the transmitter by bit-interleaved coded modulation (BICM) combined with modulating several streams of the BICM encoded data for transmission over two or more antennas. Space-time coding techniques improve transmission efficiency in radio channels by using multiple transmit and/or receive antennas and coordination of the signaling over these antennas. Bit-interleaved coded modulation provides good diversity gain with higher-order modulation schemes that employ binary convolutional codes. A receiver demodulates the received signals and applies multi-input, multi-output (MIMO) demapping to estimate the BICM encoded bitstream. After deinterleaving of the BICM encoded bitstream, maximum a posteriori (MAP) decoding is applied to the resulting bit stream to generate soft output values. By applying well-known turbo-decoding principles to iteratively demap and decode, the overall receiver performance is significantly improved. The MIMO demapping and MAP decoding processes exchange likelihood information to improve the bit error rate performance over several iterations of demapping/decoding. By generating tentative decisions for transmitted bits, the overall number of evaluations used for demapping may be reduced.

REFERENCES:
patent: 4742533 (1988-05-01), Weidner et al.
patent: 5291137 (1994-03-01), Freedman
patent: 2001/0033614 (2001-10-01), Hudson
Andrea M. Tonello, Space-Time Bit Interleaved Coded Modulation with an Iterative Decoding Strategy, Sep. 2000, IEEE VTC 2000, pp. 473-478.
Bernard Widrow and Samuel Stearns, Adaptive Signal Processing, Prentice-Hall, 1985.
A van Zelst et al, Turbo-Blast and its Performance, May 2001, IEEE VTC 2001 Spring, pp. 1282-1286.
Andrea M. Tonello, Performance of Space-Time Bit Interleaved Codes in Fading Channels with Simplified Iterative Decoding, May 2001, IEEE VTC 2001 Spring, pp. 1357-1361.
Stephan ten Brink, Iterative Decoding for Multicode CDMA, IEEE VTC 1999, pp. 1876-1880, May 1999.
“Lattice Code Decoder for Space-Time Codes” by Oussama Damen, etal; IEEE Communications Letters, vol. 4, No. 5, May 2000.
“Space-Time Bit-Interleaved Coded Modulation With An Iterative Decoding Strategy” by Andrea M. Tonello; Proceedings, VTC 2000 Fall, Boston, MA, Sep. 2000, pp. 473-478.

Affiliated with

Also associated with

Rating

Reduced complexity receiver for space-time- bit-interleaved... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Reduced complexity receiver for space-time- bit-interleaved..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reduced complexity receiver for space-time- bit-interleaved... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3710171