An antenna selection based initial ranging method is proposed in orthogonal frequency division multiple access (OFDMA) networks with multiple-input multiple-output (MIMO) for IEEE 802.16m standard. In the proposed scheme, the initial ranging signal processing is selected by the antenna selection at the base station, where the receive antenna with the largest received signal-to-interference-and-...

Bandwidth, power and collision are considered as three important resources in wireless networks. Therefore, how to manage these resources becomes a effect on wireless ad hoc network. These effects are not present in wire line networks, and evaluation of available bandwidth in wireless networks a difficult task. Furthermore, in wireless medium the available resources also vary with the protocol ...

The performance comparison of the most feasible multiple access techniques proposed for fourth generation wireless communication systems, i.e., Orthogonal Frequency Division Multiplexing (OFDM) and Multi-Carrier Code Division Multiple Access (MC-CDMA) is evaluated. The objective is to find the most suitable technique for implementation in 4G Communication Systems. The modems of OFDM and MC-CDMA...

A new multiple access scheme using Multi-Symbol Encapsulated Orthogonal Frequency Division Multiplexing (MSE-OFDM) is proposed. This is basically a time division multiple access (TDMA) technique utilizing the MSE-OFDM. The Bit Error Rate (BER) performance of the TDMA system using conventional OFDM is slightly better than that of the proposed system. This weakness is compensated as the proposed ...

Abstract In this paper, new multiple access schemes based on the combination of Code Division Multiple Access (CDMA) and Multicarrier modulation (also known as OFDM (Orthogonal Frequency division Multiplexing)) are reviewed. Some of the main systems proposed to date are identified and the advantages of such systems discussed. A description of a simulation platform developed to analyse the perfo...