发明授权
- 专利标题: Interference cancelation using edge signals for synchronization signal detection
- 专利标题(中): 干扰消除使用边缘信号进行同步信号检测
-
申请号: US13077685申请日: 2011-03-31
-
公开(公告)号: US08942223B2公开(公告)日: 2015-01-27
- 发明人: Xiaoxia Zhang , Tao Luo
- 申请人: Xiaoxia Zhang , Tao Luo
- 申请人地址: US CA San Diego
- 专利权人: QUALCOMM Incorporated
- 当前专利权人: QUALCOMM Incorporated
- 当前专利权人地址: US CA San Diego
- 代理商 Tyler J. Overall
- 主分类号: H04B1/10
- IPC分类号: H04B1/10 ; H04L27/26 ; H04J11/00 ; H04L5/00
摘要:
In 3GPP Release (Rel) 8, a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) may be transmitted in six resource blocks, occupying, for example, the center 62 tones (i.e., subcarriers) of an LTE-A system, wherein the center tone may be skipped. In synchronous networks, cells may transmit their respective PSS and SSS on the same frequency at the same time, wherein strong cells may overshadow the weak ones. However, strong cells may not be the serving cell for a user equipment (UE), particularly in a heterogeneous network. Traditionally, interference cancelation, an enhanced receiver technique, has been used, wherein the UE may first find the strong cells and cancel them out to find the serving cell. However, due to propagation delay and synchronization uncertainty, a timing offset may exist among cells, even in synchronous networks. Therefore, systems and methods are disclosed, providing for improved handling of the timing offset among different cells by applying a time domain cancelation.
公开/授权文献
信息查询