Receiver
Reverse direction isolation of LNA inside Transceiver IC suppresses unwanted radiation. Then
RF signal will be directly down to IF signal (RX IQ) and high frequency spurious emissions are
suppressed by LPF. At last RX IQ signal will be demodulated digital data.
Base band Processing
1. Channel selection is controlled by
BBP
IC to support data modulation:
- DSSS (BPSK/QPSK/CCK)
- OFDM (BPSK/QPSK/16QAM/64QAM)
Power Control Level
It uses closed-loop power control function to limit RF output power level.
Transmit/Receive Switch
EUT has
Transmit/Receive Switch and Antenna switch. End user can’t select any power setting.
Channel Selection Restriction
For product available in the USA/Canada/Taiwan market, only channel 1~11 can be operated.
Selection of other channels is not possible. But product also could be available in the
Europe/Japan market, channel 1~13 can be operated under the manufacturer change the different
driver.
Data Rate Control
The operation date rate is changing during data transfer base on the optimization of driver.
Discontinue Transmitting with absence of Data or operational failure states
“The device shall automatically discontinue transmission in case of either absence of information
to transmit or operational failure. These provisions are not intended to preclude the transmission
of control or signaling information or the use of repetitive codes used by certain digital
technologies to complete frame or burst intervals. Applicants shall include in their application for
equipment authorization a description of how this requirement is met.” Data transmission is
always initiated by software, which is then passed down through the MAC, through the digital
and analog baseband, and finally to the RF chip.
Several special packets (ACKs, CTS, PSPoll, etc...) are initiated by the MAC. These are the only
ways the digital baseband portion will turn on the RF transmitter, which it then turns off at the
end of the packet. Therefore, the transmitter will be on only while one of the aforementioned
packets is being transmitted.
Product Details
> Modulation see the below table for draft n
> Data Modulation OFDM (BPSK / QPSK / 16QAM / 64QAM)
> Frequency : 2.4GHz and 5GHz
> Data Rate (Mbps) see the below table for Draft n
> Channel Number 4 for 20MHz bandwidth ; 2 for 40MHz bandwidth
> Channel Band Width (99%) MCS8 (20MHz): 18.08 MHz ; MCS8 (40MHz): 36.48 MHz
