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This paper proposes an incremental redundancy hybrid ARQ (IR-HARQ) scheme for the wireless local area network (WLAN) system employing multiband simultaneous transmission. The proposed scheme adopt the rate compatible low-density parity-check (RC-LDPC) codes based on IEEE802.11n LDPC codes and ensure backward compatibility with WLAN devices by using the current WLAN control frame. Additionally, it...
In this paper, we propose a synchronization scheme to obtain frequency diversity in a WLAN system which simultaneously uses the multiple bands such as 5 GHz, 2.4 GHz and 920 MHz simultaneously. The proposed scheme is to combine the output of correlators after compensation for the difference of the center frequency on each frequency band. The proposed scheme obtains a large frequency diversity gain...
We propose a class of spatially-coupled low-density parity-check (SC-LDPC) codes consisting of a finite-length chain of component LDPC matrices which are assigned with different degree distributions, i.e., the strength of spatial coupling is nonuniform within an SC-LDPC code. For this class of codes, we use a modified density evolution algorithm to calculate the belief-propagation (BP) threshold on...
Automated interference detection is required for operation and management services in wireless networks as Wireless Local Area Networks (WLANs) based on IEEE 802.11 Standard since co-channel interference from other wireless transmitters occurs irregularly. We propose a new approach for detecting the presence of interference on 802.11 links. Our solution focuses on the Access Point (AP)-initiated monitoring...
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