Non-Coherent MIMO of Per Transmit Antenna Differential Mapping (PADM) Employing Asymmetric Space-Time Mapping and Channel Prediction

作者：Kubo Hiroshi^*; Yamagishi Takuma; Mori Toshiki

来源：IEICE TRANSACTIONS ON COMMUNICATIONS, 2017, E100B(5): 808-817.

DOI：10.1587/transcom.2016EBP3162

• multiple-input multiple-output
• transmit diversity
• spatial multiplexing
• differential space-time signal processing
• maximum-likelihood detection
• Viterbi detection

This paper proposes performance improvement schemes for non-coherent multiple-input multiple-output (MIMO) communication systems employing per transmit antenna differential mapping (PADM). PADM is one form of differential space-time coding (DSTC), which generates an independent differentially encoded sequence for each of the multiple transmit antennas by means of space-time coding and mapping. The features of the proposed schemes are as follows: 1) it employs an asymmetric space-time mapping instead of the conventional symmetric space-time mapping in order to lower the required signal to noise power ratio (SNR) for maintaining the bit error rate (BER) performance; 2) it employs an analytically derived branch metric criterion based on channel prediction for per-survivor processing (PSP) in order to track fast time-varying channels. Finally, computer simulation results confirm that the proposed schemes improve the required SNR by around 1 dB and can track at the maximum Doppler frequency normalized by symbol rate of 5%.

• 出版日期2017-5