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The maximum likelihood estimate of the impulse response of a frequency-selective channel in the presence of phase noise and I/Q imbalance is derived. The complexity of the joint estimator is reduced using approximate cost functions for both phase noise and I/Q imbalance. The proposed estimator is first applied to OFDM transmission in a single-input single-output system and then generalized to multi-input...
In multiple input and multiple output (MIMO) system, the channel code is very important and complex compare single antenna system. Space-time codes (STC) were proposed to solve the problem. In space-time codes family the space-time block code and space-time trellis code are applied in many cases. In this paper we proposed the maximum likelihood detector used in space-time trellis codes system, and...
The maximum-likelihood (ML) detection is the optimal detection for vertical Bell Laboratories layered space-time (V-BLAST) systems if the channel is perfectly known at the receiver. Unfortunately, the perfect channel knowledge is always unavailable in practical systems. In this paper, we investigate the joint design of channel estimation and data detection for V- BLAST systems in spatially correlated...
To combine the power efficiency of continuous phase modulation (CPM) with enhanced performance in fading environments, some authors have suggested to use CPM in combination with space-time codes (STC). Recently, we have proposed a CPM ST-coding scheme based on L2-orthogonality for two transmitting antennas. In this paper we extend this approach to the three antennas case. We analytically derive a...
In this paper, using diagonal signal repetition, we propose a high-rate groupwise space-time block code (GSTBC) which can be effectively decoded by a low-complexity successive interference cancellation (SIC) based receiver. The proposed GSTBC and SIC based receiver are jointly designed such that the diversity repetition in a GSTBC can induce the dimension expansion to suppress interfering signals...
The recently developed IEEE 802.16e specifications for broadband wireless access include three multiple-input multiple-output (MIMO) profiles employing 2??2 space-time codes (STCs) and two of those are mandatory on the downlink of mobile WiMAX systems. One of these is full rate, and the other is full diversity, but neither of them has both of the desired features. The third profile, which is not mandatory,...
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