CYW43570 datasheet(44/93 Pages) CYPRESS

Part #	CYW43570

Description	Single-Chip 5G WiFi IEEE 802.11ac 2횞2MAC/Baseband/Radio with IntegratedBluetooth 4.1 and EDR

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Manufacturer	CYPRESS [Cypress Semiconductor]

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44 / 93 page

Document Number: 002-15054 Rev. *I

Page 44 of 94

ADVANCE

CYW43570

10.2 IEEE 802.11ac Draft PHY

The CYW43570 WLAN Digital PHY is designed to comply with IEEE 802.11ac Draft and IEEE 802.11a/b/g/n dual-stream specifica-

tions to provide wireless LAN connectivity supporting data rates from 1 Mbps to 866.7 Mbps for low-power, high-performance handheld

applications.

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.

The key PHY features include:

■ Programmable data rates from MCS0–15 in 20 MHz, 40 MHz, and 80 MHz channels, as specified in IEEE 802.11ac Draft

■ Supports Optional Short GI and Green Field modes in Tx and Rx

■ Tx and Rx LDPC for improved range and power efficiency

■ Beamforming support

■ 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

■ 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 21. WLAN PHY Block Diagram

Filters and Radio

Comp

Frequency and

Timing Synch

Carrier Sense, AGC, and

Rx FSM

Radio Control Block

Common Logic Block

Filters and Radio Comp

AFE and

Radio

MAC

Interface

Buffers

OFDM Demodulate

Viterbi Decoder

Tx FSM

PA Comp

Modulation and

Coding

Modulate/Spread

Frame and

Scramble

FFT/IFFT

CCK/DSSS Demodulate

Descramble and

Deframe

COEX

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