Efficient modeling of low-resolution millimeter-wave transceivers for massive MIMO wireless communications systems

摘要

We present a high-fidelity measurement-based nonlinear model of low-complexity millimeter-wave transmit and receive circuits for design and analysis of 1-bit on-off-key (OOK) massive MIMO wireless communications systems. The receive model is based upon a fabricated 38 GHz energy detector, representative of state-of-the-art OOK millimeter-wave receivers. The model is validated with measurements and includes nonlinear noise modeling. Performance of a large-scale massive MIMO system is predicted with the model, and predictions are compared against a 4-transmit-element, N-receive-element testbed. Finally, we compute the channel capacity of several OOK massive MIMO systems, exploring tradeoffs in power consumption and number of transmit and receive cells. Results indicate a 1-bit OOK array with low power pre-amplifiers can achieve similar capacity to a classical linear receiver with less than one tenth the power consumption. The 1-bit array compensates for the per-cell simplicity by increasing the total number of cells while maintaining low overall power consumption.