Channel-adaptive wideband wireless video telephony

Hanzo, Lajos; Wong, C.H.; Cherriman, Peter

doi:10.1109/79.855910

Cited by 8 publications

(1 citation statement)

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“…To overcome these problems and utilise system resource more efficiently, several studies have been made on adaptive transmission according to the channel traffic [1][2][3][4][5][6][7][8][9]. In [1], an adaptive scheme for packet data in a DS-CDMA environment was proposed where the transmission rate is adaptively controlled by measuring the number of consecutive packet successes and failures.…”

Section: Introductionmentioning

confidence: 99%

Throughput–delay performance of interference level-adaptive transmission in voice∕data integrated CDMA network with variable spreading gain

2004

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The throughput and delay performance of adaptive spreading gain uplink packet transmission in real-time and non-real-time data integrated CDMA networks are analysed under AWGN and Rayleigh fading channels. The processing gain for the non-real-time data is adaptively changed according to the total uplink interference level so that a required signal-to-interference ratio (SIR) can be achieved. The optimum values for the required SIR with regard to maximising the throughput are derived as a function of packet length. The optimised adaptive rate system achieves significantly improved throughput compared to the non-adaptive rate system. In addition, the adaptive rate system achieves almost linear increase in packet delay with traffic density, while the packet delay of the non-adaptive rate system shows an abrupt increase as traffic density increases.

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