Transmission System Testing, Monitoring, and Control

Smith, David R.

doi:10.1007/978-1-4419-8933-8_11

Cited by 1 publication

(1 citation statement)

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“…This is because QAM has larger distance between constellation point compare to QPSK. Even though QAM is seen to have the same spectrum and bandwidth efficiency as QPSK but still it is difficult to demodulate in the presence of noise [12]. Addition of STBC in the system also becomes a big help for the antennas to achieve maximum diversity.…”

Section: Icmie 2016mentioning

confidence: 99%

BER Performance of QAM and QPSK Modulation Technique for DCT Based Channel Estimation of STBC MIMO OFDM

2016

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Abstract. Consumer demand for high speed data communication system is increasing day by day. However the major challenges for wireless communication system are Inter Symbol Interference (ISI) and Inter Carrier Interference (ICI) that occur during data transmission. This interference will distort signal and increase error rate in the system. Combination of Orthogonal Frequency Division Multiplexing (OFDM) and Multiple Input Multiple Output (MIMO) give a reliable high data rate. Discrete Cosine Transform (DCT)-based channel estimation is used in STBC MIMO-OFDM and simulated using MATLAB software. The system performance is compared with multiple antenna configuration and different modulation technique. Multiple antenna configurations that involve during simulation are 2x2, 4x4 and 6x6 while modulation techniques are Quadrature Amplitude Modulation (QAM) and Quadrature Phase Shift Keying (QPSK). This simulation will prove that the higher number of transmit and receive antenna, the lower BER for the system.

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Section: Icmie 2016mentioning

confidence: 99%