Soft Sphere Detection with Bounded Search for High-Throughput MIMO Receivers
Cavallaro, Joseph R.
sphere detection; iterative detection and decoding; MIMO OFDM downlink; high-throughput soft detector design
We propose the design of soft sphere detection with the search method independently bounded for specific search levels (transmit antennas). The bounds are based on the distribution of the candidates found in each search level. The area and throughput estimates are compared against two previously implemented soft detectors. It is shown that our approach achieves significantly better performance than the previously implemented modified soft K-best solution mostly because no bound is established for the first search level. The proposed design is smaller and faster than other implemented list sphere detector with 256 search steps. The performance is comparable while the average number of search steps is significantly smaller for our method.
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- ECE Publications