Bhasker Gupta

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Multiple transmit and receive antennas can be used to form multiple-input multiple-output (MIMO) channels to increase the capacity (by a factor of the minimum number of transmit and receive antennas) and data rate. In this paper, the combination of MIMO technology and orthogonal frequency division multiplexing (OFDM) systems is considered for wideband(More)
Inter-symbol in0terference is a major limitation of wireless communications. It degrades the performance significantly if the delay spread is comparable or higher than the symbol duration. To mitigate ISI equalization need to be incorporated at the receiver end. Two of the most popular equalization algorithms are zero forcing (ZF) equalizer and minimum mean(More)
In this paper, an Orthogonal Frequency Division Multiplexing (OFDM) system with equalizers is modeled. Two different equalizers, namely Zero Forcing (ZF) and Minimum Mean Square Error (MMSE), along with different modulations are used. The modulation with multicarrier is employed, which provides advantages like inter symbol interference (ISI) reduction, high(More)
Multi-input-multi-output (MIMO) systems along with orthogonal frequency division multiplexing (OFDM) technique plays a crucial role in 4G based wireless networks. The inclusion of MIMO technology enables new types of links such as downlink multi-user communication. Long term evolution (LTE) systems are based on multi-user MIMO technologies, which have(More)
Multi-input multi-output (MIMO) is a 4G Wireless Communication Technique and is supposedly has the most promising reign. Multi-user MIMO has an edge over 4G wireless systems due to their better spectral efficiency, diversity gain and interference suppression. This paper incorporates the moment generating function (MGF) based closed form upper bounds of pair(More)
Multiple input multiple output (MIMO) communication systems along with orthogonal frequency division multiplexing (OFDM) have a great potential for future 4G broadband wireless communications. Recently, low density parity check codes (LDPC) achieves good error correcting performance and capacity near Shannon's limit. In this paper, we considered the(More)
Multiple input multiple output (MIMO) system is one of the most promising wireless technologies that can achieve wide coverage, high throughput and improved reliability. Low density parity check (LDPC) codes can achieve capacity near Shannon's limit with good error correcting performance. In this paper, we combined LDPC codes with orthogonal space time(More)