Simulation and Performance Evaluation of Distributed Sample-Based Acquisition Technique for DS/CDMA
نویسندگان
چکیده
The distributed sample based acquisition (DSA) is one of the fast and robust systems for the synchronization of long PN codes in DS/CDMA environments. In DSA systems the transmitter samples and sends the state of its long shift register generator (SRG), in a distributed manner, over short period PN sequence called as igniter sequence. Receiver detects and applies the state samples to correct the state of its long SRG. In this paper, we present the simulation results of the DSA scheme for a long PN code of length 2^15-1.The performance of the DSA is evaluated in the presence of AWGN and compared with that of the Serial Search Acquisition (SSA) scheme.
منابع مشابه
Bit Error Performance for Asynchronous Ds Cdma Systems Over Multipath Rayleigh Fading Channels (RESEARCH NOTE)
In recent years, there has been considerable interest in the use of CDMA in mobile communications. Bit error rate is one of the most important parameters in the evaluation of CDMA systems. In this paper, we develop a technique to find an accurate approximation to the probability of bit error for asynchronous direct–sequence code division multiple–access (DS/CDMA) systems by modeling the multipl...
متن کاملAcquisition Performance of Gold Sequence Based DS-CDMA Systems
The ]performance of sequence acquisition for Gold sequence based DS-CDMA systems is studied in this paper. We consider the use of a sliding correlator-type structure for the acquisition scheme. Since acquisition of a I’N sequence in DS-CDMA systems can be formulated as testing two simple hypotheses, we apply fixed sample size (FSS) for the synchronization test. The acquisition schemes require t...
متن کاملThroughput Improvement of STS-Based MC DS-CDMA System with Variable Spreading Factor
The throughput enhancement of Space-Time Spreading (STS)-based Multicarrier Direct Sequence Code Division Multiple Access (MC DS-CDMA) system is investigated in this paper. Variable Spreading Factor (VSF) is utilized to improve the data throughput of the system. In this contribution, an analytical approach is proposed to compute a new expression for the Bit Error Rate (BER) performance of t...
متن کاملNonlinear Multiuser Receiver for Optimized Chaos-Based DS-CDMA Systems
Chaos based communications have drawn increasing attention over the past years. Chaotic signals are derived from non-linear dynamic systems. They are aperiodic, broadband and deterministic signals that appear random in the time domain. Because of these properties, chaotic signals have been proposed to generate spreading sequences for wide-band secure communication recently. Like conventional DS...
متن کاملPerformance of P N Code Acquisition in a DS/CDMA Overlay Environment with Imperfect Power Control
AbstTactIn this paper, performance of PN code acquisition is analyzed for a DS/CDMA overlay system with imperfect power control. Acquisition performance is evaluated in terms of mean acquisition time using state transition diagram for acquisition process. To apply for a DS/CDMA cellular environments, the MA1 and imperfection of power control are taken into account in the analysis of acquisition...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2009