Fundamentals of wireless communication
Fundamentals of wireless communication
On fast-decodable space-time block codes
IEEE Transactions on Information Theory
Fast maximum-likelihood decoding of the golden code
IEEE Transactions on Wireless Communications
Full-diversity full-rate complex-field space-time coding
IEEE Transactions on Signal Processing
The golden code: a 2×2 full-rate space-time code with nonvanishing determinants
IEEE Transactions on Information Theory
An optimal two transmit antenna space-time code and its stacked extensions
IEEE Transactions on Information Theory
Perfect Space–Time Block Codes
IEEE Transactions on Information Theory
A simple transmit diversity technique for wireless communications
IEEE Journal on Selected Areas in Communications
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In this work we design efficient soft output demodulators (also referred to as fast soft demodulators) for the 2×2 Golden code, which is a promising candidate space time block code in the evolving IEEE and 3GPP cellular standards. For this code, the naive approach for maximum likelihood (ML) hard decision as well as soft-output demodulation entails a complexity of O(M4), where M denotes the cardinality of the QAM constellation from which the underlying modulated symbols are drawn. In contrast, our efficient demodulator exploits the structure of the code and yields the ML decision and soft outputs in the form of exact max-log log-likelihood ratios (LLRs) with an O(M2.5) complexity. Moreover, we also design a sub-optimal soft output demodulator that has an O(M0.5) complexity comparable to that of the linear minimum mean square error (LMMSE) based demodulator but results in substantial performance gains.