BCM4330 Preliminary Data Sheet
WLAN PHY Description
WLAN PHY Description
The BCM4330 WLAN Digital PHY is designed to comply with IEEE 802.11a/b/g/n single stream to provide
wireless LAN connectivity supporting data rates from 1 Mbps to 72.2 Mbps for low power, high performance
handheld applications.
The PHY has been designed to work with interference, radio nonlinearity, and impairments. It incorporates
efficient implementations of the filters, FFT and Viterbi decoder algorithms. Efficient algorithms have been
designed to achieve maximum throughput and reliability, including algorithms for carrier sense/rejection,
frequency/phase/timing acquisition and tracking, channel estimation and tracking. The PHY receiver also
contains a robust 11b demodulator. The PHY carrier sense has been tuned to provide high-throughput for
802.11g/11b hybrid networks with Bluetooth coexistence. It has also been designed for shared single antenna
systems between WL and BT to support simultaneous Rx-Rx.
PHY Features
• Supports IEEE 802.11a, 11b, 11g, 11n single stream PHY standards
• 802.11n single-stream operation in 20 MHz channels
• Supports Optional Short GI and Green Field modes in Tx and Rx
• Supports optional space-time block code (STBC) receive of two space-time streams
• Supports 802.11h/k for worldwide operation
• Advanced algorithms for low power, enhanced sensitivity, range, and reliability
• Algorithms to improve performance in presence of Bluetooth
• Simultaneous Rx-Rx (WL-BT) architecture
• Automatic gain control scheme for blocking and non blocking application scenario for cellular applications.
• Closed loop transmit power control
• Digital RF chip calibration algorithms to handle CMOS RF chip non-idealities
• On-the-fly channel frequency and transmit power selection
• Supports per packet Rx antenna diversity
• Designed to meet FCC and other worldwide regulatory requirements
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BROADCOM
BCM4330 Preliminary Data Sheet
April 28, 2011 • 4330-DS304-RI
Page 90