Cypress CYW43353 - Page 53

Document No. 002-14949 Rev. *E Page 53 of 113
PRELIMINARY
CYW43353
The key PHY features include:
■ Programmable data rates from MCS0–9 in 20 MHz, 40 MHz, and 80 MHz channels, as specified in IEEE 802.11ac
■ Supports Optional Short GI mode in TX and RX
■ TX and RX LDPC for improved range and power efficiency
■ Supports optional space-time block code (STBC) receive of two space-time streams for improved throughput and range in
fading channel environments.
■ 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 27. 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