OFDM Baseband Receiver Design for Wireless Communications

10

System Examples

OFDM baseband receivers include several key modules implementing signal-processing tasks of diverse nature. In addition, OFDM system parameter design is a complicated process of trading off different factors, such as channel delay spread, spectral efficiency, transmission rate and others. System examples offer concrete illustration of design considerations as well as implementation details and, hence, can help designers, experienced and novice, in their receiver design efforts.

Baseband receiver design of OFDM systems involves quite broad and complicated knowledge and experiences. Until now, this book has treated several important issues related to this work, yet no introduction to design technology is complete without actual examples. In this chapter, two OFDM receiver IC developments will be described. The first example demonstrates a receiver implemented for a wireless communication system that combines the multi-carrier OFDM modulation and the multiple-access capability of the code-division multiple access (CDMA). The second example is a wireless OFDM receiver IC for cognitive radio applications. In this wireless LAN-like OFDM receiver, dynamic spectrum access, MIMO techniques and channel assessment functions are integrated to meet the requirements of cognitive radio applications.

10.1 MC-CDMA Downlink Receiver IC

The downlink MC-CDMA receiver is designed for a next-generation mobile cellular communication system. Taking advantages of both multi-carrier ...