Transceivers Tackle 4G Communications

May 21, 2009
A pair of highly integrated radio transceivers, the models AD9356 and AD9357 from Analog Devices, support 4G communications applications, including WiMAX and LTE. The transceivers integrate 12-b analog-to-digital converters (ADCs), digital-to-analog ...

A pair of highly integrated radio transceivers, the models AD9356 and AD9357 from Analog Devices, support 4G communications applications, including WiMAX and LTE. The transceivers integrate 12-b analog-to-digital converters (ADCs), digital-to-analog converters (DACs), complete RF-receive and RF-transmit signal chains, and on-chip frequency synthesizers. The AD9356 and AD9357 transceivers support the 2.3-to-2.7-GHz and 3.3-to-3.8-GHz ranges, respectively, with noise figure of 3 dB, covering existing WiMAX bands and channel bandwidths of 3.5, 4.375, 5, 7, 8.75, and 10 MHz. The new transceivers include two complete receivers as well as two complete transmitters for the support of multiple-input and multiple-output (MIMO) systems. The transmitters achieve +13 to +36 dBm output power at the antenna port. Designers can optimize receiver performance by configuring the transceivers to use a flexible, on-chip AGC (automatic gain control) algorithm. The transceivers include hooks for using incumbent baseband-controlled automatic gain control (AGC). The AD9356 and AD9357 are housed in 10 x 10-mm CSP BGA packages.

About the Author

Jack Browne | Technical Contributor

Jack Browne, Technical Contributor, has worked in technical publishing for over 30 years. He managed the content and production of three technical journals while at the American Institute of Physics, including Medical Physics and the Journal of Vacuum Science & Technology. He has been a Publisher and Editor for Penton Media, started the firm’s Wireless Symposium & Exhibition trade show in 1993, and currently serves as Technical Contributor for that company's Microwaves & RF magazine. Browne, who holds a BS in Mathematics from City College of New York and BA degrees in English and Philosophy from Fordham University, is a member of the IEEE.

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