Luo Yi, Winstead Chris, Chiang Patrick
Department of Electrical and Computer Engineering, UMC 4120, Utah State University, Logan, UT 84322, USA.
Annu Int Conf IEEE Eng Med Biol Soc. 2012;2012:779-82. doi: 10.1109/EMBC.2012.6346047.
This paper evaluates the performance of a 125Mbps Impulse Ratio Ultra-Wideband (IR-UWB) system for cortical implant devices by using low-Q inductive coil link operating in the near-field domain. We examine design tradeoffs between transmitted signal amplitude, reliability, noise and clock jitter. The IR-UWB system is modeled using measured parameters from a reported UWB transceiver implemented in 90nm-CMOS technology. Non-optimized inductive coupling coils with low-Q value for near-field data transmission are modeled in order to build a full channel from the transmitter (Tx) to the receiver (Rx). On-off keying (OOK) modulation is used together with a low-complexity convolutional error correcting code. The simulation results show that even though the low-Q coils decrease the amplitude of the received pulses, the UWB system can still achieve acceptable performance when error correction is used. These results predict that UWB is a good candidate for delivering high data rates in cortical implant devices.
本文通过使用在近场域中运行的低品质因数电感线圈链路，评估了用于皮层植入设备的125Mbps脉冲比率超宽带（IR-UWB）系统的性能。我们研究了发射信号幅度、可靠性、噪声和时钟抖动之间的设计权衡。IR-UWB系统使用从采用90nm CMOS技术实现的已报道超宽带收发器的测量参数进行建模。为了构建从发射器（Tx）到接收器（Rx）的完整通道，对用于近场数据传输的低品质因数的非优化电感耦合线圈进行了建模。开关键控（OOK）调制与低复杂度卷积纠错码一起使用。仿真结果表明，尽管低品质因数线圈会降低接收脉冲的幅度，但在使用纠错时，超宽带系统仍能实现可接受的性能。这些结果预示着超宽带是在皮层植入设备中实现高数据速率的良好候选方案。
