发明名称 |
METHOD AND APPARATUS FOR DATA TRANSMISSION IN A SYSTEM EMPLOYING DIFFERING TRANSMISSION PROTOCOLS |
摘要 |
A method and apparatus for channel estimation in a system employing differing transmission protocols as broad-cast/multicast and unicast protocols. The number of pilot tones used for broadcast transmission is greater than the number of pilot tones used for a unicast transmission. The channel estimation may be significantly degraded when a symbol from a broadcast transmission slot is adjacent to a symbol from a unicast transmission slot, since the pilots of the adjacent slots are used for the channel estimate. Therefore, it is determined whether a first time slot of one transmission protocol (multicast slot) is adjacent to a second time slot of another transmission protocol (unicast slot), and if a first symbol of the unicast slot. The pilot power or/and the number of the pilot sub-carriers is/are increased for the edge symbol of the multicast slot for purposes of channel estimation using the edge symbol. |
申请公布号 |
UA88026(C2) |
申请公布日期 |
2009.09.10 |
申请号 |
UA20070004507 |
申请日期 |
2005.09.23 |
申请人 |
QUALCOMM INCORPORATED |
发明人 |
MANTRAVADI ASHOK;MALLADI DURGA PRASAD;AGRAVAL AVNISH;STAMOULIS ANASTASIOS |
分类号 |
H04L25/02;H04J3/16;H04L5/02;H04W52/32 |
主分类号 |
H04L25/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|