（Root Raised Cosine Filter）根升余弦滤波器的MATLAB代码
标签： Raised Cosine Filter MATLAB
上传时间： 2014-01-07
上传用户：gonuiln
在Multisim 10软件环境下，设计一种由运算放大器构成的精确可控矩形波信号发生器，结合系统电路原理图重点阐述了各参数指标的实现与测试方法。通过改变RC电路的电容充、放电路径和时间常数实现了占空比和频率的调节，通过多路开关投入不同数值的电容实现了频段的调节，通过电压取样和同相放大电路实现了输出电压幅值的调节并提高了电路的带负载能力，可作为频率和幅值可调的方波信号发生器。Multisim 10仿真分析及应用电路测试结果表明，电路性能指标达到了设计要求。 Abstract: Based on Multisim 10， this paper designed a kind of rectangular-wave signal generator which could be controlled exactly composed of operational amplifier， the key point was how to implement and test the parameter indicators based on the circuit diagram. The duty and the frequency were adjusted by changing the time constant and the way of charging and discharging of the capacitor， the width of frequency was adjusted by using different capacitors provided with multiple switch， the amplitude of output voltage was adjusted by sampling voltage and using in-phase amplifier circuit，the ability of driving loads was Raised， the circuit can be used as squarewave signal generator whose frequency and amplitude can be adjusted. The final simulation results of Multisim 10 and the tests of applicable circuit show that the performance indicators of the circuit meets the design requirements.
上传时间： 2014-01-21
上传用户：shen007yue
tServer task executes functions at low priority (254). serverSend funtion is used to send a request to the tServer to execute a function at the tServer s priority. First tServer task executes the i() system call to print the summary of tShell task. Next an address exception is caused in tServer task by trying to execute a funtion at non-aligned word boundry. As a result SIGBUS signal is Raised automatically. Signals (setjmp() and longjmp()) are used to allow the tServer task to recover gracefully from an address error exception. For more information about signals, please refer to sigLib manual pages.
标签： serverSend functions executes priority
上传时间： 2015-09-21
上传用户：tianjinfan
ARMask.The ARM has six operating modes: • User (unprivileged mode under which most tasks run) • FIQ (entered when a high priority (fast) interrupt is Raised) • IRQ (entered when a low priority (normal) interrupt is Raised) • Supervisor (entered on reset and when a Software Interrupt instruction is executed) • Abort (used to handle memory access violations) • Undef (used to handle undefined instructions) * ARM Architecture Version 4 adds a seventh mode: • System (privileged mode using the same registers as user mode)
标签： unprivileged operating ARMask modes
上传时间： 2013-12-24
上传用户：bcjtao
Modify the Gray-coded modulation example (COMMDOC_GRAY) so that it uses a pair of square root Raised cosine filters to perform pulse shaping and matched filtering at the transmitter and receiver, respectively.
标签： COMMDOC_GRAY Gray-coded modulation example
上传时间： 2017-01-07
上传用户：zhangzhenyu
