FPGA Architecture of Generalized Laguerre-Volterra MIMO Model for Neural Population Activities

We present a full-parallelized and pipelined architecture for a generalized Laguerre-Volterra MIMO system to identify the time-varying neural dynamics underlying spike activities. The proposed architecture consists of a first stage containing a vector convolution and MAC (Multiply and Accumulation) component, a second stage containing a prethreshold potential updating unit with an error approximation function component, and a third stage consisting of a gradient calculation unit. A flexible and efficient architecture that can accommodate different design speed requirements is generated. The design runs on a Xilinx Virtex-6 FPGA and the processing core produces data samples at a speed of 1.33×10^6 data frames/sec, which is 3.1×10^3 times faster than the corresponding C model running on an Intel i7-860 Quad Core Processor.