A Cost-Effective Reuse Method of Off-the-Shelf MIMO Wireless LAN IPs with a Nested Spatial Mapping
By Ealwan Lee,
GCT Semiconductor, Inc.
This paper presents a spatial mapping which turns dual data streams of MIMO system into an equivalent single stream. It is achieved by shrinking the constellation of the secondary stream into that of the primary data stream so that the primary one can be decoded even with a simple SISO de-mapper. Thereby, it can be transmitted through a single antenna and decoded successfully by either a conventional two-antenna MIMO receiver or even a single-antenna receiver. The effective modulation order of the proposed composite stream is the sum of the two data streams resulting in a higher throughput than the maximum of SISO system still conforming to the existing MIMO wireless communication standards.
Ealwan Lee is an engineering director working for GCT Semiconductor since 2001, Inc. He received B.S., M.S. and Ph. D all in electrical engineering from Seoul National University in 1992, 1994 and 1998, respectively. He has over 20 year expertise in VLSI implementation of wireless communication systems especially in WiMAX, WLAN, Bluetooth.