TY - JOUR
T1 - Differential space-time-frequency coded OFDM with maximum multipath diversity
AU - Ma, Qian
AU - Tepedelenlioglu, Cihan
AU - Liu, Zhiqiang
N1 - Funding Information:
Manuscript received February 25, 2003; revised March 20, 2004 and August 1, 2004; accepted October 20, 2004. The editor coordinating the review of this paper and approving it for publication is H. Xu. This work was supported by the National Science Foundation CAREER Grant CCR-0133841; parts of this work have appeared in [11] and [12].
PY - 2005/9
Y1 - 2005/9
N2 - Addressing orthogonal frequency division multiplexing (OFDM) transmissions over frequency-selective Rayleigh fading channels, we propose a differential space-time-frequency (DSTF) coding scheme with maximum multipath diversity. Resorting to subcarrier grouping, we convert the system into a set of parallel DSTF systems, within which DSTF coding is considered. Through pairwise error probability (PEP) analysis, we prove that full diversity gain, which is the product of the number of transmit antennas, receive antennas, and the multipath channel length, can be achieved without channel state information (CSI) at the receiver. We analyze the performance of group DSTF coding over correlated fading channels and establish the design criteria for subcarrier selection and code selection. In addition to applying existing differential unitary diagonal codes, we propose a systematic approach to designing nondiagonal codes for DSTF systems, which are block diagonal (BD) and have the necessary unitary and full diversity properties. Based on permutation techniques, we have devised new excellent-performing BD DSTF codes, which significantly improve the coding gain as compared to their diagonal counterparts. Corroborating simulations confirm the merits of our approach.
AB - Addressing orthogonal frequency division multiplexing (OFDM) transmissions over frequency-selective Rayleigh fading channels, we propose a differential space-time-frequency (DSTF) coding scheme with maximum multipath diversity. Resorting to subcarrier grouping, we convert the system into a set of parallel DSTF systems, within which DSTF coding is considered. Through pairwise error probability (PEP) analysis, we prove that full diversity gain, which is the product of the number of transmit antennas, receive antennas, and the multipath channel length, can be achieved without channel state information (CSI) at the receiver. We analyze the performance of group DSTF coding over correlated fading channels and establish the design criteria for subcarrier selection and code selection. In addition to applying existing differential unitary diagonal codes, we propose a systematic approach to designing nondiagonal codes for DSTF systems, which are block diagonal (BD) and have the necessary unitary and full diversity properties. Based on permutation techniques, we have devised new excellent-performing BD DSTF codes, which significantly improve the coding gain as compared to their diagonal counterparts. Corroborating simulations confirm the merits of our approach.
KW - Block diagonal codes
KW - Differential space-time-frequency coding
KW - Diversity techniques
KW - Orthogonal frequency division multiplexing (OFDM)
KW - Space-time coding
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U2 - 10.1109/TWC.2005.853973
DO - 10.1109/TWC.2005.853973
M3 - Article
AN - SCOPUS:26844509076
SN - 1536-1276
VL - 4
SP - 2232
EP - 2243
JO - IEEE Transactions on Wireless Communications
JF - IEEE Transactions on Wireless Communications
IS - 5
ER -