BCM4390DKWBGT Datasheet, PDF (35/78 Pages) Cypress Semiconductor – WICED™ Wi-Fi IEEE 802.11 b/g/n SoC with Embedded Application Processor

BCM4390 Advance Data Sheet
IEEE 802.11n PHY
The PHY has been designed to work in the presence of interference, radio nonlinearity, and various other
impairments. It incorporates optimized 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 IEEE 802.11b demodulator. The PHY carrier sense has been tuned to
provide high throughput for IEEE 802.11g/11b hybrid networks.
The key PHY features include:
• Programmable data rates in 20 MHz channels, as specified in IEEE 802.11n
• Supports Optional Short GI and Green Field modes in Tx and Rx
• Tx and Rx LDPC for improved range and power efficiency
• All scrambling, encoding, forward error correction, and modulation in the transmit direction and inverse
operations in the receive direction.
• Supports IEEE 802.11h/k for worldwide operation
• Advanced algorithms for low power, enhanced sensitivity, range, and reliability
• 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
• Available per-packet channel quality and signal strength measurements
• Designed to meet FCC and other worldwide regulatory requirements
Figure 9 on page 35 is a block diagram of the WLAN PHY.
BROADCOM ®
February 5, 2014 • 4390-DS103-R
WICED Wi-Fi IEEE 802.11 SoC w/Embedded App Processor
Page 34
BROADCOM CONFIDENTIAL