Packet error rate and throughput estimation for link adaptation in wireless local area networks

Shafiee, H.; Khoshgard, M.

doi:10.1109/iccs.2002.1183251

Cited by 2 publications

(1 citation statement)

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“…Although the received signal level of a MT remains constant, the channel condition between the AP and MT may vary significantly when the Ricean k-factor is very small, resulting inappropriate selection of transmission mode for the signal-strength-based conventional algorithm. The work in [4] proposed a link adaptation scheme based on the estimate of signal to noise ratio (SNR) for each sub-channel, from which the overall symbol error rate for different modulation modes are obtained, than taking Viterbi decoder into account and find the packet error rate (PER) for each case. This paper presents a novel closed-loop link adaptation algorithm by selecting the transmission mode based on the Ricean k-factor and SNR of the channel.…”

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confidence: 99%

Throughput Improvement Via Smart Antenna and Link Adaptation Scheme for IEEE 802.11A Systems

Juang

Lin

2006

2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications

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Propagation delay spread and inter-symbol interference impact the transmission performance of WLAN systems. This paper presents performance enhancement using beamforming techniques operated at the access point. The performance by using omni-directional, switched beam system and phase array system in an indoor office are analyzed and compared. Based on the IEEE 802.11a physical layer specification, numerical simulations indicate that adopting directional antennae at the access point can increase diversity gain in non-line-of-sight propagations channels, while the packet error rate remains below 10-2. Besides, this paper also presents a link adaptation algorithm, based on the Ricean k-factor and signal to noise ratio, for throughput enhancement in IEEE 802.11a systems. Simulation results show that the average throughput reaches 33.7Mbps in the signal-strength-based conventional algorithm, but rises to 43.1Mbps when adopting the proposed scheme.

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confidence: 99%