BCM43455 Datasheet, PDF (78/159 Pages) Cypress Semiconductor – Single-Chip 5G WiFi IEEE 802.11ac MAC/Baseband/ Radio with Integrated Bluetooth 4.1 and FM Receiver

BCM43455 Preliminary Data Sheet
IEEE 802.11ac 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 with Bluetooth coexistence. It has also been
designed for shared single antenna systems between WL and BT to support simultaneous RX-RX.
The key PHY features include:
• Programmable data rates from MCS0–MCS9 in 20, 40, and 80 MHz channels, as specified in
IEEE 802.11ac.
• 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.
• Algorithms to improve performance in presence of Bluetooth.
• 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 29: WLAN PHY Block Diagram
Filters
and
Radio
Comp
AFE
and
Radio
Radio
Control
Block
Common
Logic
Block
Filters
and
Radio
Comp
Frequency
and Timing
Synch
Carrier Sense,
AGC, and Rx
FSM
CCK/DSSS
Demodulate
OFDM
Demodulate
Viterbi Decoder
Buffers
FFT/IFFT
Descramble
and Deframe
MAC
Interface
TX
FSM
PA Comp
Modulation
and Coding
Modulate/
Spread
Frame and
Scramble
COEX
Broadcom^®
November 5, 2015 • 43455-DS109-R
BROADCOM CONFIDENTIAL
Page 77