Performance of transmit diversity scheme with quantized phase-only feedback

Milleth, J. Klutto; Giridhar, K.; Jalihal, Devendra

doi:10.1109/spcom.2004.1458393

Cited by 14 publications

(7 citation statements)

References 13 publications

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“…Unlike the earlier work in [1] for three and four transmit antennas, constructing CO-STBC for five or six transmit antennas is not straightforward. In this letter, we construct a rate 3/4 CO-STBC for five and six transmit antennas, using a one parameter phase feedback, starting from a rate 3/4 QSTBC for eight transmit antennas, similar to [5].…”

Section: Introductionmentioning

confidence: 99%

“…However, these codes have a higher decoding complexity than OSTBC and do not achieve full diversity. Starting with QSTBC, we had earlier proposed Manuscript rate-one CO-STBC with a single parameter phase feedback for three or four transmit antennas in [1]. CO-STBC is different from OSTBC due to the fact that OSTBC uses an orthogonal codeword matrix to decouple the transmitted signal vector from the channel, while CO-STBC uses the feedback information for orthogonalizing the channel.…”

Section: Introductionmentioning

confidence: 99%

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Closed-loop transmit diversity schemes for five and six transmit antennas

Milleth

Giridhar

Jalihal

2005

IEEE Signal Process. Lett.

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Closed-loop, rate-one, channel orthogonalized space-time block codes (CO-STBCs) for three and four transmit antennas using a single (real) phase feedback term have been proposed [1]. These codes achieve full diversity and result in maximum likelihood (ML) decoding with only linear processing at the receiver similar to OSTBCs. In this paper, we propose a closed-loop STBC for five and six transmit antennas with rate 3/4, where the one parameter feedback angle can be evaluated in closed form. These codes achieve full diversity and are delay optimal. Simulation results comparing the error-rate performance of the CO-STBC with open-loop OSTBC as well as some quasiorthogonal space-time block codes are also provided. While the 1-to 5-dB gain accrued by the closed-loop scheme (over the open-loop methods) is not surprising, the novel contribution of this work is in the approach taken to derive the feedback parameter as a single phase term, which is purely a function of the channel gains.Index Terms-Closed-loop, diversity, orthogonal STBC, spacetime block coding.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Closed-loop transmit diversity schemes for five and six transmit antennas

Milleth

Giridhar

Jalihal

2005

IEEE Signal Process. Lett.

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“…that the STBC system performance with single stream using quasi-orthogonal structure can be enhanced [6], [7]. Especially, with efficient quantization by improving the characteristics of the effective channel, 1-bit feedback scheme is shown to achieve near-optimum performance [8].…”

Section: Introductionmentioning

confidence: 99%

Closed-Loop Space Time Block Coding for High Data Rate with Angle Feedback

Kim

Ariyavistakul

Seshadri

2011

2011 IEEE International Conference on Communications (ICC)

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Transmit diversity schemes with multiple streams obtain reliable transmission but suffer from interference when decoding multiple streams simultaneously. In this paper, we present closed-loop space-time block codes for multiple streams with limited channel information in order to ease suppressing interference at a receiving station. The proposed scheme includes constellation rotation in Alamouti coding pairs by feedback angle information. The sub-optimum solution for feedback angle is found to maximize the output signal-to-noise ratio (SNR). Simulation results show the proposed scheme with only a few bits feedback achieves nearly full diversity gain with reduced interference.

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“…On the other aspect, there also are many closed-loop methods for STBC/SFBC proposed to attain full diversity gain and unity code rate [6] [7], but such schemes rely on a sufficient number of feedback bits to achieve full diversity (3~5 bits at least) [8] [9]. In [10], a 4-antenna transmit diversity scheme based on QO-STBC/SFBC with only 1-bit feedback is proposed, whose feedback type is not as the same as that in other quantized versions of exact angle feedback.…”

Section: Introductionmentioning

confidence: 99%

Adaptive MIMO-OFDM System Based on QO-STBC/SFBC with Improved Feedback Scheme

Qiu

Zhou

2009

2009 5th International Conference on Wireless Communications, Networking and Mobile Computing

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In this paper, we propose an adaptive multiple-input multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) system based on quasi-orthogonal space time/frequency block coding (QO-STBC/SFBC) with an improved angle feedback scheme. First we exploit the improved feedback scheme which can minimize the non-orthogonality of QO-STBC/SFBC by rotating constellation symbols. Then we investigate its quantification method and the related criterions. Furthermore, we apply the adaptive modulation technique to this scheme in frequency selective channel. Simulation results show that the proposed feedback scheme can provide higher signal-tonoise ratio (SNR) gains, and systems with such scheme can get significant improvement by applying adaptive modulation technique.

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Performance of transmit diversity scheme with quantized phase-only feedback

Cited by 14 publications

References 13 publications

Closed-loop transmit diversity schemes for five and six transmit antennas

Closed-loop transmit diversity schemes for five and six transmit antennas

Closed-Loop Space Time Block Coding for High Data Rate with Angle Feedback

Adaptive MIMO-OFDM System Based on QO-STBC/SFBC with Improved Feedback Scheme

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