Effect of feedback delay and channel gain difference on distributed transmit diversity without receiver phase compensation

Amini, Sahar; Na, Dongjun; Choi, Kwonhue

doi:10.1109/ictc.2016.7763355

Cited by 1 publication

(3 citation statements)

References 22 publications

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“…Figure 2 shows the performance of DTD in the presence of RPC for the various correlation factor pairs (=the various feedback delays) and the various MCG pairs. It is shown that the theoretical results, which are plotted using (14), agree with the simulations in all MCG ranges, which verifies the correctness of our analysis. From those curves, it is obvious that as the feedback delay increases, that is, , decreases, the performance degrades.…”

Section: Simulation and Numerical Resultssupporting

confidence: 72%

“…Using the SNR statistical characterization, the average error rate of DTD without RPC is calculated in our previous work [14] as…”

Section: Average Error Rate In the Absence Of Rpc By Substitutingmentioning

confidence: 99%

“…The exact outage probability, ergodic capacity, and the average error rate performance of CTD in spatially correlated multipleinput single-output (MISO) systems with feedback delay and channel measurement error have been analyzed in [6]. In our previous work [14], we studied the performance of DTD with delay in the absence of RPC. However, the performance degradation by excluding RPC in DTD systems has not been investigated compared to DTD systems in the presence of RPC.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Distributed Transmit Diversity with Outdated Diversity Weights

Amini

Choi

2017

Mobile Information Systems

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Distributed transmit diversity (DTD) technique that combines cooperative communications and diversity techniques is a suitable solution in 5th-generation (5G) systems. In this paper, we investigate the effect of receiver phase compensation (RPC) on the performance of DTD. We introduce new expressions for the average error rate of DTD in the presence of RPC. The derived expressions are useful for a large number of modulation schemes. We obtain further insights by comparing the RPC effect on DTD with different spatially correlated collocated transmit diversity (CTD). The new observations include the following: (1) In the case of feedback delay, the phase compensation (PC) is required on the receiver side in addition to the transmitter side. (2) In DTD with RPC, the system performance is improved by increasing the differences between the channel gain variances. However, this is the opposite of the case of DTD without RPC. (3) The correlated CTD is more sensitive to RPC than DTD. This sensitivity increases by enhancing the correlation between transmit (TX) antennas. (4) In the case where there is no delay for CTD or DTD, RPC does not affect the system's performance.

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Section: Simulation and Numerical Resultssupporting

confidence: 72%

“…Using the SNR statistical characterization, the average error rate of DTD without RPC is calculated in our previous work [14] as…”

Section: Average Error Rate In the Absence Of Rpc By Substitutingmentioning

confidence: 99%