发明专利
TW201001940A 無線收發器中發射機洩漏的主動消除 ACTIVE CANCELLATION OF TRANSMITTER LEAKAGE IN A WIRELESS TRANSCEIVER
审中-公开
基本信息:
- 专利标题： 無線收發器中發射機洩漏的主動消除 ACTIVE CANCELLATION OF TRANSMITTER LEAKAGE IN A WIRELESS TRANSCEIVER
- 专利标题（英）：Active cancellation of transmitter leakage in a wireless transceiver
- 专利标题（中）：无线收发器中发射机泄漏的主动消除 ACTIVE CANCELLATION OF TRANSMITTER LEAKAGE IN A WIRELESS TRANSCEIVER
- 申请号：TW098106240 申请日：2009-02-26
- 公开(公告)号：TW201001940A 公开(公告)日：2010-01-01
- 发明人： 穆 峰浩
- 申请人： LM艾瑞克生(PUBL)電話公司
- 申请人地址： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) 瑞典 SE
- 专利权人： LM艾瑞克生(PUBL)電話公司
- 当前专利权人： LM艾瑞克生(PUBL)電話公司
- 当前专利权人地址： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) 瑞典 SE
- 代理人： 蔣大中
- 优先权： 美國 12/038,487 20080227
- 主分类号： H04B
- IPC分类号： H04B
Active transmitter leakage cancellation techniques are disclosed, for reducing transmitter leakage in a frequency-duplexing radio transceiver. Reducing transmitter leakage to the receiver path of a duplex transceiver eases the linearity requirements for low-noise amplifier and mixer circuits, potentially reducing transceiver cost as well as complexity. In an exemplary method, a radio-frequency (RF) cancellation signal is generated from a transmitter signal, and the RF cancellation signal is combined with a received RF signal to obtain a combined RF signal comprising a residual transmitter leakage component. The residual transmitter leakage component of the combined RF signal is converted, using, e.g., a frequency mixer, to obtain a down-converted signal at baseband or at an intermediate frequency. A magnitude of the residual transmitter leakage component is detected from the down-converted signal, and used to adjust the phase or amplitude of the RF cancellation signal, or both, to reduce the residual transmitter leakage component.