ALGORITHMS AND ARCHITECTURE IMPLEMENTATIONS OF MIMO OFDM BASEBAND RECEIVER BASED ON THE SIMD DSP CORE

This letter presents a programmable single-chip architecture for Multi-lnput and Multi-Output （M1MO） OFDM baseband receiver. The architecture comprises a Single Instruction Multiple Data （SIMD） DSP core and three coprocessors that are used for synchronization, FFT and channel decoder. In this MIMO OFDM system, the Zero Correlation Zone （ZCZ） code is used as the synchronization word preamble of packet in the physical layer in order to avoid the interference from other transmitting antennas. Furthermore, a simple channel estimation algorithm is proposed which is appropriate tbr the SIMD DSP computation.

输送带接头的快速粘合剂

一、前言输送带接头的粘接方法,通常有环氧树脂粘接、热硫化法粘接、氯丁—多异氰酸酯粘接等几种。但环氧树脂粘带有在接头结合层脆性大、抗曲折的挠性差,接头易开裂、使用寿命短等弊病,因此,已基本上不采用;硫化法粘带主要在于工艺复杂、耗电量多,技术难度大等原因也逐步被冷粘工艺所取代。