mo phong ber cua OFDM

We investigate the case of independent Rayleigh faded paths between antenna elements and find that with high probability extraordinary capacity is available. Compared to the baseline n = 1 case, which by Shannon’s classical formula scales as one more bit/cycle for every 3 dB of signaltonoise ratio (SNR) increase, remarkably withMEAs, the scaling is almost like n more bits/cycle for each 3 dB increase in SNR. To illustrate how great this capacity is, even for small n, take the cases n = 2, 4 and 16 at an average received SNR of 21 dB. For over 99 of the channels the capacity is about 7, 19 and 88 bits/cycle respectively, while if n = 1 there is only about 1.2 bit/cycle at the 99 level. For say a symbol rate equal to the channel bandwith, since it is the bits/symbol/dimension that is relevant for signal constellations, these higher capacities are not unreasonable. The 19 bits/cycle for n = 4 amounts to 4.75 bits/symbol/dimension while 88 bits/cycle for n = 16 amounts t

多线程串口通信程序-multithread serial communication program

Source Code in C language for microcontrollers of 51 family to implement serial communications based on RS-485 protocol.

shoujie ri li baincheng jaca xiao cheng cu-shoujie ri baincheng jaca Xiao WM cu

MODBUS_TCP规范,不过这是英文版，英语水平不高的同志可以装个金山词霸！-MODBUS_TCP norms, but this is the English version, English level is not high comrades can fit 000 free email!

a matlab code for 64 QAM digital modulation

周立功lpc2210开发板启 动源码详细 分析-Week Ligong lpc2210 development board to start a detailed analysis of source

Ph.D thesis from M.H.Perrott, about Fractional-N PLL design.

关于ZIGBEE技术开发中cc2430串口调试问答的pdf文件，对于在进行ZIGBEE研究或开发中遇到该类问题的朋友很有用-ZIGBEE technology development on the cc2430 debug serial port of the Q & A pdf document ZIGBEE in research or development issues encountered in such useful friends

Zigbee无线通信技术简介,ppt格式.-Zigbee wireless communication technology profile, ppt format.