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ICASSP
2011
IEEE
8 years 2 months ago
A hybrid compressed sensing algorithm for sparse channel estimation in MIMO OFDM systems
Due to multipath delay spread and relatively high sampling rate in OFDM systems, the channel estimation is formulated as a sparse recovery problem, where a hybrid compressed sensi...
Chenhao Qi, Lenan Wu
ICC
2009
IEEE
121views Communications» more  ICC 2009»
8 years 8 months ago
Channel Estimation and Tracking Schemes for the Pulse-Shaping OFDM Systems
Robust channel estimation scheme is essential for pulse-shaping OFDM systems in the multipath mobile environment. This paper proposes three types of channel estimation schemes for ...
Bayarpurev Mongol, Takaya Yamazato, Masaaki Kataya...
TWC
2008
150views more  TWC 2008»
8 years 10 months ago
Design and analysis of post-coded OFDM systems
This paper discusses the design and analysis of post coded OFDM (PC-OFDM) systems. Coded or precoded OFDM systems are generally employed to overcome the symbol recovery problem in...
S. F. A. Shah, Ahmed H. Tewfik
TWC
2008
137views more  TWC 2008»
8 years 10 months ago
Ml joint CFO and channel estimation in OFDM systems with timing ambiguity
This letter addresses the problem of joint estimation of carrier frequency offset (CFO) and channel for OFDM systems in the presence of timing ambiguity. Based on two signal models...
Jianwu Chen, Yik-Chung Wu, Shaodan Ma, Tung-Sang N...
WCE
2007
8 years 11 months ago
Performance Analysis of Adaptive Beamforming Algorithms for Orthogonal Frequency Division Multiplexing System
—Orthogonal Frequency Division Multiplexing (OFDM) is gaining popularity for high data rate communication systems. We propose the use of adaptive beamforming for interference rej...
Samra Jabeen, Shaheer Naeem, Syed Javed Hussain, A...
ICMCS
2000
IEEE
88views Multimedia» more  ICMCS 2000»
9 years 2 months ago
Progressive Image Transmission over OFDM Systems using Multiple Antennas
A Joint source-channel coding (JSCC) scheme for SPIHT coded image transmission over OFDM systems with spatial diversity is proposed where no feedback channel is available. By usin...
Jie Song, K. J. Ray Liu
VTC
2006
IEEE
121views Communications» more  VTC 2006»
9 years 4 months ago
Estimation of the Channel-Impulse-Response Length for Adaptive OFDM Systems Based on Information Theoretic Criteria
Abstract—This paper proposes a new scheme based on information theoretical criteria to estimate the Channel-ImpulseResponse (CIR) length, whose accurate estimate represents one o...
Ali Aassie Ali, Van-Duc Nguyen, Kyandoghere Kyamak...
VTC
2006
IEEE
134views Communications» more  VTC 2006»
9 years 4 months ago
Efficient Algorithms for PAPR Reduction in OFDM Transmitters Implemented using Fixed-Point DSPs
OFDM has a very high peak-to-average power ratio. This imposes stringent dynamic range requirements on the analog front-ends of the transmitter and receiver and, if a fixedpoint pr...
Brendon J. C. Schmidt, Chi Ng, Patrick Yien, Chris...
VTC
2007
IEEE
192views Communications» more  VTC 2007»
9 years 4 months ago
Exact BER Analysis of OFDM Systems Communicating over Frequency-Selective Fading Channels Subjected to Carrier Frequency Offset
— Orthogonal Frequency Division Multiplexing (OFDM) has been employed in numerous wireless standards. However, the performance of OFDM systems is degraded by both the Carrier Fre...
Xiang Liu, Lajos Hanzo
ISCAS
2007
IEEE
178views Hardware» more  ISCAS 2007»
9 years 4 months ago
On the Joint Compensation of IQ Imbalances and Phase Noise in MIMO-OFDM Systems
Abstract— OFDM systems are susceptible to receiver impairments such as IQ imbalance and phase noise. These impairments can severely degrade the achievable effective signalto-nois...
Qiyue Zou, Alireza Tarighat, Ali H. Sayed
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