RFICs
Creating perfect simulation for wireless receiver test
Nov 1, 2007 12:00 PM,
By David A. Hall
This article explains the importance of receiver simulation and validation by illustrating how wireless impairments can affect a communications channel. It also describes how RF record and playback systems can be used as tools to validate receiver design....
Fully integrated CMOS transmitter design considerations
Nov 1, 2007 12:00 PM,
By Louis Fan Fei
Traditionally, multiple IC chips are needed to build transmitters (Tx) used in wireless communications. The difficulty with a full Tx integration is that each Tx building block uses different technology. A power-detection circuit will exploit the Schottky diode, while the modulator IC is integrated with BiCMOS or SiGe. Likewise, the digital control loop is implemented in CMOS. Now that direct-conversion Tx uses digital control loop for nonlinearity corrections, CMOS...
Fully integrated CMOS transmitter design considerations
Traditionally, multiple IC chips are needed to build transmitters (Tx) used in wireless communications. The difficulty with a full Tx integration is that each Tx building block uses different technology. A power-detection circuit will exploit the Schottky diode, while the modulator IC is integrated with BiCMOS or SiGe. Likewise, the digital control loop is implemented in CMOS. Now that direct-conversion Tx uses digital control loop for nonlinearity corrections, CMOS...
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Will 3G LTE give mobile devices a new edge?
With competitive pressure building from mobile WiMAX and ultramobile broadband, supporters at the Third Generation Partnership Project are looking beyond the current 3G wireless technologies, such as wideband CDMA, which were developed for a mixture of voice and data communications over the same wireless network. ...
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