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Orthogonal frequency division multiplexing (OFDM) is used for high speed communication but carrier frequency offset (CFO) creates problem in the working of OFDM and introduces loss of orthogonality between the subcarriers and gives rise to Inter Carrier Interference (ICI). The main causes of ICI are instability of local oscillators and Doppler affect. For the solution of CFO problem, self cancellation...
Long Term Evolution (LTE) has adopted Single Carrier Frequency Division Multiple Access (SCFDMA) technique for uplink and Orthogonal Frequency Division Multiple Access (OFDMA) for downlink. SCFDMA is often called as Discrete Fourier Transform (DFT) spread OFDMA. In this paper, Wavelet based SCFDMA is proposed for analyzing Bit Error Rate (BER) performance. Analysis is carried out using different wavelets...
Orthogonal Frequency Division Multiplexing (OFDM) and Multiple Input and Multiple Output (MIMO) are two main techniques employed in 4th Generation Long Term Evolution (LTE). In OFDM multiple carriers are used and it provides higher level of spectral efficiency as compared to Frequency Division Multiplexing (FDM). In OFDM because of loss of orthogonality between the subcarriers there is intercarrier...
To achieve higher data rate as specified in LTE-Advanced, support of wider Bandwidths are required than the existing 20 MHz system bands. Carrier Aggregation is the technique deployed in LTE-A system that can extends system bandwidth up to 100 MHz which also increases the downlink spectral efficiency. N-x-OFDMA will be used as the downlink transmission scheme in LTE-A. The primary concern in carrier...
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