Transport Capacity and Spectrum Power Efficiency of Large Wireless CDMA Ad Hoc Networks with Optimum Code Rate Allocation

In this paper, we study the transport capacity – the transported bit-meters per symbol period per node, and the space time spectrum power efficiency – the transported bit-meters per Hz per second per square meter per watt for large wireless CDMA ad hoc networks. The node density and processing gain tend to infinity with their ratio kept a constant. The limiting networks consist of infinitely dense, sender uniformly distributed, mutually independent, and memoryless Gaussian channels connecting all pairs of sending and receiving nodes on the entire 2-D plane. The MMSE receiver, decorrelator, and MF are employed. Gaussian input Gaussian noise channel, binary input Gaussian noise channel and symmetric binary channel are considered. The transport capacity and space time spectrum power efficiency with joint optimization of code rate distribution, MAC and routing protocols are obtained in closed form as functions of entire network profile.