Performance of spreading code in MC DS CDMA system using HDL coding in CADENCE

摘要

Many recent standards in telecommunication fields are based on Code Division Multiple Access (CDMA) spread spectrum transmission. MC-cdma (Multi Carrier-cdma) is a very promising candidate for multiple access schemes in Fourth Generation wireless communication candidate, because it provides data rate up to 10mbps. The DS-cdma (Direct Sequence-cdma) is expected to be the major medium access technology in the future mobile system owing to its potential capacity enhancement and the robustness against noise. On combining the techniques of MC-cdma and DS-cdma forms MC- DS-cdma (multi carrier direct sequence cdma) MC-DS-cdma system. The spreading codes are an important parts of code division multiple access based wireless cellular system. There are many spreading codes avail for the system like PN sequence, Gold sequence, Kasami sequence and chaotic sequence. This system is evaluated in Nakagami fading channel model, which can be used to model urban and suburban environments. This system is designed under VLSI environment and so Verilog HDL and Vhdl are used for coding the system. CADENCE is used for verification and synthesis of the system. With CADENCE we can able to estimate area, power and elapsed timing calculation can be done easily.