Technical field of despreading and demodulating the invention relates to the wireless communication, the invention discloses a OQPSK intermediate frequency spread spectrum and despreading and demodulation method, which comprises the following steps: A. in spread spectrum OQPSK transmitter to the input bit stream spread spectrum; signal B. in accordance with the steps of a after spreading through the wireless channel transmission to the receiving end; C. for demodulation at the receiving end; according to the D. threshold level step C calculation, find the maximum peak position, according to I Q, two positive and negative polarity correlation peak, judge signal data sent by the sending terminal. The technical proposal of the invention is convenient for realizing the spread spectrum system. ?
【技术实现步骤摘要】
【技术保护点】
一种扩频OQPSK中频及解扩解调方法,其包含以下步骤:a.在扩频OQPSK发射端对输入的比特流进行扩频;b.依照步骤a扩频后的信号通过无线信道传输至接收端;c.在接收端进行解扩解调:将步骤b传输至接收端的信号进行采样,采样频率既满足耐奎斯特带通采样定理,采样频率又为码元速率的整数倍;并将采样后的信号计算功率能量并选取功率能量的整数倍作为匹配滤波器的门限电平;采样后的信号分为I、Q两路,并分别将I、Q两路信号进行解扩;d.根据步骤c计算的门限电平,找到最大相关峰的位置,根据I、Q两路相关峰值的正负极性关系,判断发送端发送的信号数据。
【技术特征摘要】
【专利技术属性】
技术研发人员:吉磊,许醇彪,
申请(专利权)人:四川九洲电器集团有限责任公司,
类型:发明
国别省市:51
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。