An Algorithm for Iterative Detection and Decoding MIMO-OFDM HARQ with Antenna Scheduling

Kim, KyooHyun

doi:10.3837/tiis.2008.04.003

Cited by 5 publications

(3 citation statements)

References 9 publications

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“…] T also denote the bit sequence mapped to X [p,q] . Given [ , ] H pq , Λ , and 2 s , the log-likelihood ratio (LLR) of x i , i Î {0,…, 2 Mp+ Mq -1} estimated using a mutiple-input mutiple-output (MIMO) maximum a posteriori (MAP) detector is written as [22], [23]…”

Section: Map Detection With Dual Phase Errors Compensationmentioning

confidence: 99%

“…(1) 0   , the approximation of (1) , L ka for aÎ {p, q}, kÎ {0,1,…,N-1}\{a}, can be derived as a function of  as and similarly, the approximation of (2) , L ka for aÎ {p, q}, k Î {0,1,…,N-1}\{a}, can also be derived as a function of  as Therefore, by using the estimated dual phase errors (1) 0 L from (23), we can obtain estimates of ( 29) and ( 30 33) is repeated until all the data samples in an OFDM symbol are detected. This enables the following LDPC decoder to produce reliable a priori information in the first iteration.…”

Section: Successive Ici Cancellationmentioning

confidence: 99%

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Iterative Detection and ICI Cancellation for MISO-mode DVB-T2 System with Dual Carrier Frequency Offsets

et al. 2012

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In the DVB-T2 system with a multiple-input single-output (MISO) transmission mode, Alamouti coded orthogonal frequency division multiplexing (OFDM) signals are transmitted simultaneously from two spatially separated transmitters in a single frequency network (SFN). In such systems, each transmit-receive link may have a distinct carrier frequency offset (CFO) due to the Doppler shift and/or frequency mismatch between the local oscillators. Thus, the received signal experiences dual CFOs. This not only causes dual phase errors in desired data but also introduces inter-carrier interference (ICI), which cannot be removed completely by simply performing a CFO compensation. To overcome this problem, this paper proposes an iterative detection with dual phase errors compensation technique. In addition, we propose a successive-iterative ICI cancellation technique. This technique successively eliminates ICI in the initial iteration by exploiting pre-detected data pairs. Then, in subsequent iterations, it performs a fine interference cancellation using a priori information, iteratively fed back from the channel decoder. In contrast to previous works, the proposed techniques do not require estimates of dual CFOs. Their performances are evaluated via a full DVB-T2 simulator. Simulation results show that the DVB-T2 receiver equipped with the proposed dual phase errors compensation and the successive-iterative ICI cancellation techniques achieves almost the same performance as ideal dual CFOs-free systems, even for large dual CFOs.

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Section: Map Detection With Dual Phase Errors Compensationmentioning

confidence: 99%

Section: Successive Ici Cancellationmentioning

confidence: 99%

Iterative Detection and ICI Cancellation for MISO-mode DVB-T2 System with Dual Carrier Frequency Offsets

et al. 2012

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“…It has been shown that in wireless communications with multiple active users requesting services simultaneously, a technique called multiuser diversity (MD) can be exploited to increase the system achievable rate (AR) and reliability. In such a system, channel state information (CSI) is measured at all active users and then fed back to the base station (BS) whereby the packet scheduler at the medium‐access control (MAC) layer can allocate the system resources to the user having the best channel quality 10–12. More recently, the combination of cooperative diversity and MD has been considered in References 13 and 14.…”

Section: Introductionmentioning

confidence: 99%

MIMO relay wireless networks with scheduling and transmit beamforming

Yang¹

2012

Wireless Communications

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In this paper, we investigate the performance of a multiuser wireless relay network with each of its nodes equipped with N antennas and transmit beamforming at its source and relay, where multiuser diversity (MD) is exploited to further improve the system performance. In the first part of this paper, by deriving the approximate error performance expression for a single‐relay MD system without the direct link, we obtain the maximum diversity order achievable by the CSI‐assisted amplify‐and‐forward (CAF) protocol. Then, by taking the direct link into consideration, we propose a sub‐optimal transmit beamforming scheme and show the performance loss is very small. Copyright © 2010 John Wiley & Sons, Ltd.

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Cross-layer Optimized Vertical Handover Schemes between Mobile WiMAX and 3G Networks

Jo¹,

Cho²

2008

TIIS

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Nowadays, wireless packet data services are provided over Wireless MAN (WMAN) at a high data service rate, while 3G cellular networks provide wide-area coverage at a low data service rate. The integration of mobile WiMAX and 3G networks is essential, to serve users requiring both high-speed wireless access as well as wide-area connectivity. In this paper, we propose a cross-layer optimization scheme for a vertical handover between mobile WiMAX and 3G cellular networks. More specifically, L2 (layer 2) and L3 (layer 3) signaling messages for a vertical handover are analyzed and reordered/combined, to optimize the handover procedure. Extensive simulations using ns-2 demonstrate that the proposed scheme enhances the performance of a vertical handover between mobile WiMAX and 3G networks: low handover latency, high TCP throughput, and low UDP packet loss ratio.

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An Algorithm for Iterative Detection and Decoding MIMO-OFDM HARQ with Antenna Scheduling

Cited by 5 publications

References 9 publications

Iterative Detection and ICI Cancellation for MISO-mode DVB-T2 System with Dual Carrier Frequency Offsets

Iterative Detection and ICI Cancellation for MISO-mode DVB-T2 System with Dual Carrier Frequency Offsets

MIMO relay wireless networks with scheduling and transmit beamforming

Cross-layer Optimized Vertical Handover Schemes between Mobile WiMAX and 3G Networks

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