在本篇論文中，提出一種應用於無線通訊系統的通道估計方法。無線通訊系統包含發射機跟接收機。所提出的方法包括以下步驟：發射機從多組預先設計好的稀疏隨機領航信號中，選擇一組適當的領航信號傳送到接收機。接收機收到領信號之後，隨即使用壓縮感測通道估計演算法，以得出通道響應與多重路徑的數目。並根據所估出之多重路徑數目與目前之領航信號數目，選擇下一個通道估計週期，最適當的領航信號。此外，接收機可將所選擇的該組領航信號的索引回傳給發射機。

A channel parameter estimation method adapted to a wireless communication system is proposed. The wireless communication system includes a transmitter and a receiver. The proposed method includes following steps. The transmitter transmits a plurality of pilot signals to the receiver by using one of a plurality of preconfigured sparse random pilot patterns. The receiver receives the pilot signals, performs a channel parameter estimation on the pilot signals by using a compressive sensing algorithm to obtain a multipath channel number, and selects a pilot pattern for a next cycle among the preconfigured sparse random pilot patterns according to the multipath channel number and a current pilot number. Additionally, the receiver transmits feedback information associated with the selected pilot pattern to the transmitter.