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In this paper, we propose a novel receiver consists of the Inter Symbol Interference (ISI) canceller and the turbo equalizer for orthogonal frequency division multiplexing (OFDM) systems over frequency selective fading channels where the multipath delay exceeds the guard interval duration. The proposed turbo equalization algorithm performs soft Inter Carrier Interference (ICI) cancellation and frequency...
In OFDMA cellular system, the inter-cell interference is main interference of the system, which greatly degrades the system performance. In the inter-cell interference mitigation scheme, interference cancellation based on IDMA is a potential technology, especially in full-loaded scenario. Although it can enhance the system performance, its well work needs many information such as MCS, which makes...
In this paper, we propose a linear minimum mean square error (MMSE)-based turbo frequency domain equalization (FDE) scheme for single carrier space-time block coded (STBC) transmissions. In the proposed iterative receiver, FDE is performed for each individual tone after space-time (ST) decoding and exchanges extrinsic information with the soft in soft out (SISO) decoder according to the turbo principle...
This paper proposes a new approach to apply singular value decomposition (SVD) in fractionally spaced frequency domain equalizer (FSFDE) for the single carrier MIMO-CDMA systems. Multiple data streams can be reliably transmitted through the parallel subchannels by using SVD, which can improve the capacity effectively without increasing frequency bandwidth or the average transmit power. Fractional...
A Code Division Multiple Access (CDMA) downlink receiver based on Adaptive Overlap-Cut (AOC) Method Frequency Domain Equalization (FDE) and non-linear feedback Parallel Interference Cancellation (PIC) is proposed. Firstly, the analysis for the generation and the distribution of the inherent error of Overlap-Cut (OC) Method FDE carries out the improved version of it called AOC Method FDE. Secondly,...
An iterative receiver algorithm is derived for single carrier cyclic prefix (CP) assisted block transmission systems. The proposed algorithm is based on iterative frequency domain detection and decoding. At each iteration, soft inter-symbol interference cancellation (ISIC) and minimum mean-square-error (MMSE) equalization both in the frequency domain are used symbol by symbol to minimize the performance...
In this paper, we propose a hybrid receiver scheme called FDE-PPIC, which combines minimum-mean-square-error frequency domain equalization (MMSE-FDE) with multistage partial parallel interference cancellation (P-PIC), for the downlink of single-carrier cyclic-prefix code division multiple access (CP-CDMA) system over frequency-selective channels. MMSE-FDE instead of conventional RAKE receiver is utilized...
In this paper, two iterative algorithms for NDA (nondata_aided) channel estimation are introduced to the DSJJWB system. The two iterative algorithms are named MMSE (minimum-mean-square-error) iterative algorithm and NMMSE(nonminimum-mean-square-error) iterative algorithm. The BER performances of the MRC Rake receiver with the two iterative algorithms are verified and compared via simulations. The...
In this paper, we investigate the potential benefit of transmit beamforming (BF) in HSPA uplink. We explore the possibility of improving the uplink performance (in terms of data throughput and user outage ratio) of WCDMA HSPA using BF antenna array receiver. The key difference between our study and many existing smart-antenna results is that we consider the dynamics associated with power-control and...
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