提出了基于动态帧时隙ALOHA（DFSA）协议与正交可变扩频因子码（OVSF）作为扩频码的码分多址技术相结合的超高频RFID系统，实现了在单一时隙内最多可并行识别m个RFID应答器，m为OVSF扩频码长度。
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It USES the OVSF code to reduce the interference and USES the th code to disperse the collision in time domain.
利用OVS F码的正交性来降低各个用户之间的干扰，利用TH码的随机性将冲突随机分散在时域上面。
Therefore, OVSF codes assigning algorithms should make full use of code resource by alleviating even eliminating code blocking and help system being fair to each kind of calls.
有效地减少甚至消除码阻塞，充分利用有限的OVSF码资源，实现公平分配成了OVSF码分配算法需要解决的问题。
The dynamic sequential allocation algorithm is presented according to the feature of W-CDMA OVSF code and code blocking in the stochastic allocation. The algorithm flow is specified.
文章通过研究W-CDMA系统OVSF码的特性，针对随机动态分配算法存在码阻塞的问题，提出了动态有序分配算法，并对该算法的流程给予了详细的描述。
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