Journal ArticleDOI
Frequency domain equalization for single-carrier broadband wireless systems
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TLDR
This article surveys frequency domain equalization (FDE) applied to single-carrier (SC) modulation solutions and discusses similarities and differences of SC and OFDM systems and coexistence possibilities, and presents examples of SC-FDE performance capabilities.Abstract:
Broadband wireless access systems deployed in residential and business environments are likely to face hostile radio propagation environments, with multipath delay spread extending over tens or hundreds of bit intervals. Orthogonal frequency-division multiplex (OFDM) is a recognized multicarrier solution to combat the effects of such multipath conditions. This article surveys frequency domain equalization (FDE) applied to single-carrier (SC) modulation solutions. SC radio modems with frequency domain equalization have similar performance, efficiency, and low signal processing complexity advantages as OFDM, and in addition are less sensitive than OFDM to RF impairments such as power amplifier nonlinearities. We discuss similarities and differences of SC and OFDM systems and coexistence possibilities, and present examples of SC-FDE performance capabilities.read more
Citations
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Proceedings ArticleDOI
Performance of zero-forcing equalizers for single-carrier zero-padded transmissions over multipath fading channels
TL;DR: Analysis of bit-error rate performance of single-carrier zero-padded (ZP) transmissions with zero-forcing (ZF) equalization shows analytically that the BER improves as the bandwidth efficiency decreases, and demonstrates that ZP outperforms SC cyclic prefixed (CP) transmission.
Proceedings ArticleDOI
Combating Timing Asynchronism in Relay Transmission for 3GPP LTE Uplink
TL;DR: The proposed method significantly reduces the effect of time delay asychronism at the receiver without disturbing the 3rd generation partnership project-long term evolution (3GPP LTE) uplink frame structure, data rate and increasing the complexity over frequency selective channels.
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Block spreading CDMA system: a simplified scheme using despreading before equalisation for broadband uplink transmission
TL;DR: The proposed BS-CDMA system has superior multiuser performance over the conventional direct sequence CDMA and cyclic prefix CDMA systems for uplink transmission and proposes despreading before equalisation, which reduces the frequency domain process to symbol-wise operation.
Proceedings ArticleDOI
On Interference in Uplink SDMA SC-FDE system
TL;DR: It is shown that if orthogonality between users during their training phase is assured, then good performance is achievable compared to non-orthogonal training and the way to multiplex the training either in time or frequency, does not affect the performance in time-variant channels as long as the orthog onality is maintained.
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Investigation on Optimum Control Interval for Intra-Cell Fractional TPC Using AMC for Shared Channel in Evolved UTRA Uplink
TL;DR: Throughout the simulation results, it is verified that slow intra-cell fractional TPC associated with fast AMC is effective in achieving the maximum cell throughput and cell-edge user throughput.
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Analysis and Simulation of a Digital Mobile Channel Using Orthogonal Frequency Division Multiplexing
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BER sensitivity of OFDM systems to carrier frequency offset and Wiener phase noise
TL;DR: In this contribution the transmission of M-PSK and M-QAM modulated orthogonal frequency division multiplexed (OFDM) signals over an additive white Gaussian noise (AWGN) channel is considered and the degradation of the bit error rate is evaluated.
Journal ArticleDOI
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TL;DR: This correspondence describes the construction of complex codes of the form exp i \alpha_k whose discrete circular autocorrelations are zero for all nonzero lags.