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In this paper, we propose a framework for analyzing downlink performance of cellular CDMA network without considering retransmission protocol in MAC layer. More specifically, we develop a simulation testbed for analyzing broadcast performance of WCDMA network in presence of both PHY layer and application layer forward error correction (FEC) codes only. In physical layer, low density parity check (LDPC)...
Performance analysis of Multimedia Broadcast and Multicast Services (MBMS) in Cellular CDMA has been presented in this paper. Effects of soft handoff (HO) parameters have been analyzed on MBMS. Fountain code has been considered in the application layer for the broadcast services due to its rateless nature as well as to avoid a backward channel that may be needed when ARQ is used. Turbo code has been...
In this paper, we propose signal strength ratio (SSR) based handoff algorithms for cellular networks. Conventional handoff algorithms use averaging method to minimize fluctuations of received signal strength at a mobile station (MS). The algorithm provides good performance under dynamic propagation environment and provides very less delay as averaging of signal strength is not done. Performance of...
Effects of soft handoff (HO) on forward link performance of packet data service have been presented in this paper. Outage of packet data transmission using code division multiple access (CDMA) is evaluated. Throughput and delay have also been investigated in cellular CDMA in presence of soft HO. Influence of physical layer issues like soft HO parameters, shadowing correlation, power control error...
Performance of a packetized data transmission in cellular CDMA is analyzed in presence of soft handoff and truncated power control. The combined effects of soft handoff parameters, truncated power control at physical layer and truncated ARQ at data link layer on throughput and delay performance of packet data under a prescribed delay constrain is studied. Truncated power control improves the performance...
Performance analysis of data services is studied in CDMA network in presence of beamforming and soft handoff (HO). Beamforming in conjunction with soft handoff is found to enhance throughput and reduce delay and BER significantly. A stop and wait ARQ scheme has been assumed. Both the cases of perfect and imperfect Beamforming are investigated. Effects of DoA (direction of arrival) estimation have...
This paper analyzes an adaptive processing gain based data transmission in cellular CDMA where processing gain is allocated depending on traffic intensity based on a constraint on bit error rate. Truncated automatic repeat request (T-ARQ) is used at link layer to satisfy a prescribed delay constraint. Effects of correlation among signal and interferers are included in the study. The impact of processing...
An adaptive data transmission scheme based on variable spreading gain (VSG) is studied in CDMA network in presence of soft handoff and space diversity. The processing gain is varied according to traffic intensity meeting a requirement on bit error rate (BER) at the output of a space diversity system provided by antenna array. Truncated automatic repeat request (T-ARQ) is used in link layer to further...
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