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In this work a high speed, power efficient successive approximation register (SAR) analog to digital converter (ADC) is designed using 90nm CMOS technology. Double tail dynamic latched comparator is used instead of conventional comparator which shows the significant reduction in power consumption and increases in the device speed. The simulation results indicate the suitability of the proposed novel...
During the last two decades, there is a rapid growth in demand of data rate and quality of service. As in wireless environment, signals undergo fading, multipath delay spread and inter symbol interference due to frequency selectivity at the receiver side that's why single carrier mobile communication systems are not preferred. This leads to a high probability of error and degrade the system's overall...
This paper presents S-Random interleaver based Interleave Division Multiple Access (IDMA) scheme. S-Random interleaver provides good spreading parameter which produce less correlated extrinsic values and also lowers down the error floor, hence better the system performance. As interleavers in IDMA used to recognize the different signal from the different users, S-Random interleavers are employed in...
In Recent years, Interleave Division Multiple Access (IDMA) scheme has gained a remarkable attention in wireless communication due to high spectral efficiency, high speed of communication services and low cost of receiver. This paper presents the S-Random interleaver based IDMA scheme. User specific S-Random interleaver provides good spreading and also separates the different users. The results of...
This paper provides review of different interleavers schemes in Interleave Division Multiple Access (IDMA) system, Interleavers in IDMA plays a significant role as the only medium to recognize different signal from different users. In this paper, the performance of random interleaver, helical interleaver and tree based interleaver are compared based on computational complexity, memory requirement...
In Interleave Division Multiple Access (IDMA) scheme, interleavers have significant importance in the performance of whole system. In recent years interleavers have been proved to give the best performance in terms of data security and noise immunity, but huge memory requirement and complexity are major concerns for specifying the interleaver pattern. A new helical interleaver based IDMA system has...
Orthogonal Frequency Division Multiplexing (OFDM) is one of the most promising technique for the fourth generation (4G) communication. High spectral efficiency, immunity to channel interference and nonlinear distortions are some advantages of OFDM. But frequency offset and high peak-to-average power ratios (PAPR) for large number of sub-carriers are two major drawbacks for practical application. This...
In Interleave Division Multiple Access (IDMA) scheme, interleavers play a vital role. In recent years IDMA have been proved to give the good performance in terms of data security and noise immunity, but huge memory requirement and complexity are major issues for specifying the interleaver pattern in this scheme. This paper presents the helically interleaved IDMA (HIDMA) system. HIDMA system not only...
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