Intersymbol interference cancellation in CDMA 1xEVDO network

Abstract

SUMMARYThis paper presents the BER performance of the physical layer of the code division multiple access 1x Evolution Data Only (EVDO) standard for different data transmission formats, and shows the improvement on the BER performance of the EVDO system over intersymbol interference channel by adapting the low complexity turbo equalization scheme at the receiver. The radio frequency, channel condition, and mobile user data speeds were extracted from a mobile user with a drive experiment on a live wireless EVDO network. Then, the real data were utilized to simulate the actual mobile user's data speeds in our simulations to show the overall BER performance of the EVDO system application. The simulation results are shown over Gaussian and Proakis A channels and the results indicate that significant intersymbol interference cancellation is obtained with an adapted code division multiple access system and the advantages of turbo equalization on the EVDO system are discussed in this research. Copyright © 2012 John Wiley & Sons, Ltd.

Evaluation of ultra‐wideband in vivo radio channel and its effects on system performance

“…There are different types of DFE equalizers available in the literature with their specific functions according to the requirement, such as to improve the BER and reduce ISI to get the desired signal at the receiver end. Channel coding is also used to improve the BER performance of the system but channels with high ISI first need to be equalized to cancel or reduce ISI and then recovered using channel coding. This paper presents the BER analysis of experimental in vivo radio channel with and without equalization.…”

Parameter Estimation of Turbo Code Encoder

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Reducing the complexity of distance measurement methods for circular turbo codes that use structured interleavers

“…Turbo codes [1] are widely used in many mobile and satellite communication systems such as the Enhanced Voice-Data Optimized (EV-DO) [2], the Long Term Evolution (LTE) [3] of the 3rd Generation Partnership Project (3GPP), and the digital video broadcasting with return channel via satellite (DVB-RCS) [4]. The error rate performance of turbo codes is divided into two important regions.…”