Differential Detection Based on Space-Time Block Codes
Wireless Personal Communications: An International Journal
Space-time-frequency coded OFDM over frequency-selective fading channels
IEEE Transactions on Signal Processing
Differential space-time modulation over frequency-selective channels
IEEE Transactions on Signal Processing
Single-block differential transmit scheme for broadband wireless MIMO-OFDM systems
IEEE Transactions on Signal Processing
Differential space-time-frequency coded OFDM with maximum multipath diversity
IEEE Transactions on Wireless Communications
Space-time block codes from orthogonal designs
IEEE Transactions on Information Theory
Differential space-time modulation
IEEE Transactions on Information Theory
Multiple transmit antenna differential detection from generalized orthogonal designs
IEEE Transactions on Information Theory
Diagonal algebraic space-time block codes
IEEE Transactions on Information Theory
Full-rate full-diversity space-frequency codes with optimum coding advantage
IEEE Transactions on Information Theory
A differential detection scheme for transmit diversity
IEEE Journal on Selected Areas in Communications
Wireless Personal Communications: An International Journal
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For Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing (MIMO-OFDM) system with four transmit antennas, this paper presents a novel block diagonal differential space---time---frequency (DSTF) coded scheme with full diversity and rate one. It overcomes the rate loss of the traditional differential orthogonal space---time---frequency coded scheme for four transmit antennas. The coding and decoding method are described in detail. After analyzing the system error performance, this paper provides two measures to improve the system error performance. One measure is to design good codes which achieve large coding gain. Thus, linear constellation decimation (LCD) codes are imported. The optimal decimation factors are given in the Table 1 under different design parameters. Another measure is to select a good subcarrier grouping method. A grouping method is proposed that all groups have the same subcarrier spacing. By the derived rule of evaluating subcarrier grouping, the optimal subcarrier spacing is obtained by computer search under different channels. Simulation results are presented to illustrate the performance of block diagonal DSTF codes and the proposed subcarrier grouping method.