Performance of optimum and suboptimum receivers for space-time coded systems in correlated fading
IEEE Transactions on Communications
Distribution of L-values in gray-mapped M2-QAM: closed-form approximations and applications
IEEE Transactions on Communications
Equivalence of optimum and joint processing receivers for space-time block coded systems
IEEE Transactions on Wireless Communications
Alamouti code with quadrature partial response signaling
IEEE Transactions on Wireless Communications
Low Complexity Soft Decision Technique for Gray Mapping Modulation
Wireless Personal Communications: An International Journal
Quadrature partial response signaling based on Alamouti code
ISIT'09 Proceedings of the 2009 IEEE international conference on Symposium on Information Theory - Volume 2
ICICS'09 Proceedings of the 7th international conference on Information, communications and signal processing
Implementation of an SDR platform using GPU and its application to a 2 × 2 MIMO WiMAX system
Analog Integrated Circuits and Signal Processing
| Hi-index | 0.01 |
In this letter, we derive analytical expressions for the bit error rate (BER) of space-time block codes (STBC) from complex orthogonal designs (COD) using quadrature amplitude modulation (QAM) on Rayleigh fading channels. We take a bit log-likelihood ratio (LLR) based approach to derive the BER expressions. The approach presented here can be used in the BER analysis of any STBC from COD with linear processing for any value of M in an M-QAM system. Here, we present the BER analysis and results for a 16-QAM system with i) (2-Tx, L-Rx) antennas using Alamouti code (rate-1 STBC), ii) (3-Tx, L-Rx) antennas using a rate-1/2 STBC, and iii) (5-Tx, L-Rx) antennas using a rate-7/11 STBC. In addition to being used in the BER analysis, the LLRs derived can also be used as soft inputs to decoders for various coded QAM schemes, including turbo coded QAM with space-time coding as in high speed downlink packet access (HSDPA) in 3G.