A Low Complexity Algorithm And Architecture For Mimo Detection Without Qr Decomposition

This paper presents a novel low-complexity, hard output multiple-input, multiple-output (MIMO) detection algorithm and architecture for LTE and WiFi applications. Our method provides a well-defined tradeoff between computational complexity and performance. The proposed algorithm does not require QR decomposition as a preprocessing step, as is commonly needed in sphere detection (SD). Simulation results for 3x3 and 4x4 MIMO configurations with both 16 and 64 QAM constellations show that the proposed algorithm uses a much smaller number of Euclidean distance (ED) calculations than other methods while having only a 0.5 dB loss compared to maximum likelihood detection. A 3x3 MIMO system with a 16 QAM detector architecture is also described, and the associated latency and hardware costs are given.