前言
ATM是ASYNCHRONOUS TRANSFER MODE（异步转移模式）的英文缩写，是在分组交换技术上发展起来的快速分组交换技术，它采用统计时分复用技术，并且综合吸收了分组交换高效率和电路交换速度快的优点，针对分组交换速率比较低的缺陷...前言
ATM是ASYNCHRONOUS TRANSFER MODE（异步转移模式）的英文缩写，是在分组交换技术上发展起来的快速分组交换技术，它采用统计时分复用技术，并且综合吸收了分组交换高效率和电路交换速度快的优点，针对分组交换速率比较低的缺陷，利用电路交换几乎与协议处理无关的特点，通过高性能的硬件设施来提高处理速度，实现高速化传输。它不仅适用于高速信息传送和对服务质量（QoS）的支持，还具备了综合多种业务的能力，以及动态带宽分配与连接力，和对已有技术的兼容能力。展开更多
In this paper, the bit synchronization algorithms in GNSS receiver are introduced, including the traditional histogram method, K-P algorithm and Viterbi algorithm. The FPGA implementation is also included. A novel tim...In this paper, the bit synchronization algorithms in GNSS receiver are introduced, including the traditional histogram method, K-P algorithm and Viterbi algorithm. The FPGA implementation is also included. A novel time division multiplexing technology （TDM） based on multi-channel shared synchronizer is proposed in this paper to solve the constrained hardware resource problem of multi-system satellite navigation receiver. Through the using of control state machine and data register structure, we realize the multiplexing of bit synchronizer of navigation receiver, which saves the hardware resource. After the experiment, it can be verified that the receiver based on the bit synchronization and multiplexing technology can correctly restore the navigation information.展开更多
文摘前言
ATM是ASYNCHRONOUS TRANSFER MODE（异步转移模式）的英文缩写，是在分组交换技术上发展起来的快速分组交换技术，它采用统计时分复用技术，并且综合吸收了分组交换高效率和电路交换速度快的优点，针对分组交换速率比较低的缺陷，利用电路交换几乎与协议处理无关的特点，通过高性能的硬件设施来提高处理速度，实现高速化传输。它不仅适用于高速信息传送和对服务质量（QoS）的支持，还具备了综合多种业务的能力，以及动态带宽分配与连接力，和对已有技术的兼容能力。
基金the National Natural Science Foundation of China under Grant，the China Postdoctoral Science Foundation under Grant No.2013M530526，the Fundamental Research Funds for the Central Universities under Grant No.FRF-TP-14-046A2
文摘In this paper, the bit synchronization algorithms in GNSS receiver are introduced, including the traditional histogram method, K-P algorithm and Viterbi algorithm. The FPGA implementation is also included. A novel time division multiplexing technology （TDM） based on multi-channel shared synchronizer is proposed in this paper to solve the constrained hardware resource problem of multi-system satellite navigation receiver. Through the using of control state machine and data register structure, we realize the multiplexing of bit synchronizer of navigation receiver, which saves the hardware resource. After the experiment, it can be verified that the receiver based on the bit synchronization and multiplexing technology can correctly restore the navigation information.
