The 128 Point New Mixed Radix-2 and Radix-4 Pipeline Combined SDF-MDC FFT/IFFT Processor For MIMO-OFDM Transceiver

摘要

Multi-in Multi-out Orthogonal Frequency Division Multiplexing (MIMO-OFDM) transceiver is an advanced digital communication which aims at higher throughput. It is the main part in the software defined radio which is the trending communication platform. FFT and IFFT are the key blocks in OFDM and by optimizing those, MIMO-OFDM transceiver performance improvises. To improve the performances of MIMO-OFDM transceiver architecture, a new algorithm was developed for exhibiting frequency transformation process, called "Mixed Radix-2 and Radix-4 Pipeline combined Single path Delay Feedback (SDF)-Multipath Delay Commutator (MDC)". Along with this a new algorithm is developed for multiplication of twiddle factor structure called "Modified Bit Parallel Multiplication (MBPM)" which is shifters based parallel multiplier architecture. It had provided a high throughput (2.4 Gsample/s) with 30.605ns latency lower power consumption and less area utilization (30k logic gates).