Exact performance analysis of hybrid adaptive modulation schemes in multi-channel system

Sang Do Lee; Young Chai Ko

doi:10.1109/TWC.2009.080919

Exact performance analysis of hybrid adaptive modulation schemes in multi-channel system

Sang Do Lee, Young Chai Ko

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

In this paper, we analyze the performance of a multi-channel system with the conventional adaptive modulation (AM) and two hybrid schemes, the adaptive modulation with diversity combining (AMDC) and the adaptive modulation with power loading (AMPL), respectively. In order to achieve higher spectral efficiency and more efficient usage of channel resources under the total transmit power constraint and the required bit error rate (BER), the AMDC jointly uses discrete-rate adaptation and diversity combining scheme, and the AMPL jointly uses discrete-rate adaptation and sub-optimal discrete-power loading. We derive exact closed-form expressions of the performance of a multi-channel system with the conventional adaptive modulation (AM) and these hybrid schemes, in terms of the spectral efficiency, the average BER and the outage probability. We also analyze the impact of imperfect channel estimation on the error performance and validate our analytical results by simulations. Numerical results show that both the AMDC and the AMPL offer higher spectral efficiency than the conventional AM, assuming the perfect channel estimation. However, AMDC offers better performance and reliability than AMPL, under imperfect channel estimation with complex Gaussian error.

Original language	English
Article number	5090001
Pages (from-to)	3206-3215
Number of pages	10
Journal	IEEE Transactions on Wireless Communications
Volume	8
Issue number	6
DOIs	https://doi.org/10.1109/TWC.2009.080919
Publication status	Published - 2009 Jun

Bibliographical note

Funding Information:
Manuscript received October 29, 2008; revised December 1, 2008; accepted January 26, 2009. The associate editor coordinating the review of this paper and approving it for publication was K. K. Wong. S.-D. Lee is with Samsung Electronics, Suwon, Korea (e-mail: [email protected]). Y.-C. Ko is with the School of Electrical Engineering, Korea University, Seoul 136-701, Korea (e-mail: [email protected]). This research was supported by the MIC(Ministry of Information and Communication), Korea, under the ITRC(Information Technology Research Center) support program supervised by the IITA(Institute of Information Technology Advancement) (IITA-2007-C1090-0701-0019). Digital Object Identifier 10.1109/TWC.2009.080919

Keywords

Adaptive modulation
And channel estimation error
Diversity
Multi-channel systems
Power loading

ASJC Scopus subject areas

Computer Science Applications
Electrical and Electronic Engineering
Applied Mathematics

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10.1109/TWC.2009.080919

Cite this

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abstract = "In this paper, we analyze the performance of a multi-channel system with the conventional adaptive modulation (AM) and two hybrid schemes, the adaptive modulation with diversity combining (AMDC) and the adaptive modulation with power loading (AMPL), respectively. In order to achieve higher spectral efficiency and more efficient usage of channel resources under the total transmit power constraint and the required bit error rate (BER), the AMDC jointly uses discrete-rate adaptation and diversity combining scheme, and the AMPL jointly uses discrete-rate adaptation and sub-optimal discrete-power loading. We derive exact closed-form expressions of the performance of a multi-channel system with the conventional adaptive modulation (AM) and these hybrid schemes, in terms of the spectral efficiency, the average BER and the outage probability. We also analyze the impact of imperfect channel estimation on the error performance and validate our analytical results by simulations. Numerical results show that both the AMDC and the AMPL offer higher spectral efficiency than the conventional AM, assuming the perfect channel estimation. However, AMDC offers better performance and reliability than AMPL, under imperfect channel estimation with complex Gaussian error.",

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note = "Funding Information: Manuscript received October 29, 2008; revised December 1, 2008; accepted January 26, 2009. The associate editor coordinating the review of this paper and approving it for publication was K. K. Wong. S.-D. Lee is with Samsung Electronics, Suwon, Korea (e-mail: [email protected]). Y.-C. Ko is with the School of Electrical Engineering, Korea University, Seoul 136-701, Korea (e-mail: [email protected]). This research was supported by the MIC(Ministry of Information and Communication), Korea, under the ITRC(Information Technology Research Center) support program supervised by the IITA(Institute of Information Technology Advancement) (IITA-2007-C1090-0701-0019). Digital Object Identifier 10.1109/TWC.2009.080919",

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N2 - In this paper, we analyze the performance of a multi-channel system with the conventional adaptive modulation (AM) and two hybrid schemes, the adaptive modulation with diversity combining (AMDC) and the adaptive modulation with power loading (AMPL), respectively. In order to achieve higher spectral efficiency and more efficient usage of channel resources under the total transmit power constraint and the required bit error rate (BER), the AMDC jointly uses discrete-rate adaptation and diversity combining scheme, and the AMPL jointly uses discrete-rate adaptation and sub-optimal discrete-power loading. We derive exact closed-form expressions of the performance of a multi-channel system with the conventional adaptive modulation (AM) and these hybrid schemes, in terms of the spectral efficiency, the average BER and the outage probability. We also analyze the impact of imperfect channel estimation on the error performance and validate our analytical results by simulations. Numerical results show that both the AMDC and the AMPL offer higher spectral efficiency than the conventional AM, assuming the perfect channel estimation. However, AMDC offers better performance and reliability than AMPL, under imperfect channel estimation with complex Gaussian error.

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Exact performance analysis of hybrid adaptive modulation schemes in multi-channel system

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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