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When channel state information (CSI) is not available, in a continuous fading channel, combined differential unitary space-time modulation and parallel turbo code can greatly improve the system performance, however it also meet with the error floor phenomenon. We propose a scheme of utilizing differential unitary space-time symbol-based serial turbo code for multiple-antenna wireless communication...
Unitary space-time modulation (USTM) can perform well without channel state information (CSI) in fast fading channels when signal-to-noise ratio (SNR) is large enough. However, it loses its advantages at low SNR or the channel coherence interval is T = 1. In this condition, the information should be carried by multilevel structured constellations with a single transmit antenna. Even though, the bit...
When channel state information is not available, combined unitary space-time modulation and parallel concatenated convolutional code can greatly improve the system performance, however it also meet with the error floor phenomenon. We propose a scheme of utilizing unitary space-time symbol based serial concatenated convolutional code for multiple-antenna wireless communication systems over rapid fading...
UST symbol-based turbo code has recently been proposed which can reduce the system complexity and calculation amount compared with bit-wise concatenation scheme. However, the corresponding MAP decoding algorithm still makes hardware unbearable and later its simplified versions, Max-Log-MAP and Log-MAP algorithms, appeared. In this paper, we propose a multiary SOVA decoding algorithm for UST symbol-based...
Recently, a novel scheme employing unitary space-time symbol based turbo code (USTSBTC) has been proposed that can greatly reduce the system complexity while maintaining a fairly well performance compared with the bit wise processing version. However, as we know, an intrinsic pitfall of MAP decoding algorithm for turbo code is its too large amount storage requirement. We propose a sliding window for...
An intrinsic pitfall of unitary space-time modulation is that its performance is unsatisfactory at low signal-to-noise ratio. Concatenating it with turbo code is a possible solution, however, bit wise processing results in unacceptable calculation mount. A novel scheme employing unitary space-time symbol base turbo code can greatly reduce the time delay but its MAP decoding algorithm may lead to system...
In this paper, we mainly analyze the performance of the classical time hopping bipolar pulse amplitude modulation (TH-BPAM) ultra wideband system and its coded system in the multi-user case. The performance of TH-BPAM system is analyzed in detail over an ideal AWGN channel and correlation receiver. For the proposed coded scheme, the Viterbi algorithm (VA) and soft output Viterbi algorithm (SOVA) are...
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