signal code capacity 中文意思是什麼
signal code capacity
解釋
信號編碼容量-
Assigning serial different address code to different subscribers, useful signal is taken out of the same time slot and frequence, and is transmitted with one share channel. at received end, system makes use of completed address code from sending end to do correlative check and take out useful subscriber signal. the other address code signals are treated as broadband disturbing signal which is removed. in radio environment of existing variable disturbtion and muti - way declining, expand frequence signal ’ s broadband characteristics can improve system performance obviously. cdma mobile telecommunication system has some better characteristics, such as anti - disturbing 、 anti - way declining 、 secrecy 、 capacity 、 utilizing rate of frequence resource and so on, than other mobile telecommunication system
Cdma （ codedivisionmultipleaccess ）移動通信系統的技術基礎是基於擴頻技術的碼分多址，通過給不同的用戶分配各自特定的地址碼序列，將處于相同時隙和頻率的用戶信號分離開來，採用共享通道方式傳輸信息。在接收端，系統利用與發送端完全一致的本地地址碼對接收信號進行相關檢測，提取需要的用戶信號，而將其他使用不同碼型的信號視為寬帶干擾而從中剔除掉。 -
Rapid development of data business, growing of packet network technology, and increasing of communication channel capacity, etc, bring this problem the answer : the next generation network will be base on the ip, and it will be to consist of network architecture which are diverse, synthetic and open such as speech sound, data, multimedia etc. the principle of voip ( voice over internet protocol ) is not complicated : at the sending end, sample the analogue speech sound signal, code and compress, then package and transmit it over the packet network
數據業務的快速發展、分組網路技術的成熟、數據網路通信通道容量的不斷增加等給這個問題提供了答案：下一代網路將是基於ip的，下一代網路將是可以提供包括語音、數據和多媒體等各種業務的、綜合的、開放的網路構架，而voip正是這個答案的具體體現。實現voip的原理並不復雜：將模擬的語音信號采樣、編碼並進行壓縮，封裝在數據網路的分組中進行傳輸，在接收端對數據進行解碼、數模轉換恢復成模擬信號即可。
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