[1] Jin Xiufeng, Bi Guangguo, Xiao Haiyong,. Low complexity iterative differential decoding algorithmfor multiband UWB communication systems [J]. Journal of Southeast University (English Edition), 2007, 23 (1): 7-11. [doi:10.3969/j.issn.1003-7985.2007.01.002]

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Low complexity iterative differential decoding algorithmfor multiband UWB communication systems()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

23

Issue:

2007 1

Page:

7-11

Research Field:

Information and Communication Engineering

Publishing date:

2007-03-30

Info

Title:

Low complexity iterative differential decoding algorithmfor multiband UWB communication systems

Author(s):

Jin Xiufeng;  Bi Guangguo;  Xiao Haiyong

National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China

Keywords:

multiband UWB;  multiple-input multiple-output(MIMO)system;  noncoherent detection;  group code;  iterative decoding

PACS:

TN911.2

DOI:

10.3969/j.issn.1003-7985.2007.01.002

Abstract:

Due to not requiring channel state information(CSI)at both the transmitter and the receiver, noncoherent ultra-wideband(UWB)incurs a performance penalty of approximately 3 dB in the required signal to noise ratio(SNR)compared to the coherent case.To overcome the gap, an effective differential encoding and decoding scheme for multiband UWB systems is proposed.The proposed scheme employs the parallel concatenation of two recursive differential unitary space-frequency encoders at the transmitter.At the receiver, two component decoders iteratively decode information bits by interchanging soft metric values between each other.To reduce the computation complexity, a decoding algorithm which only uses transition probability to calculate the log likelihood ratios(LLRs)for the decoded bits is given.Simulation results show that the proposed scheme can dramatically outperform the conventional differential and even coherent detection at high SNR with a few iterations.

References:

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Memo

Memo:

Biographies: Jin Xiufeng(1977—), male, graduate;Bi Guangguo(corresponding author), male, professor, bigg@seu.edu.cn.

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