User's Manual

Alpha Networks Proprietary and Confidential Information
5
2.0 Requirements
The following sections identify the detailed requirements of the 802.11n USB2.0 Module.
2.1 Functional Block Diagram
40 MHz
XTAL
Serial
EEPROM
Base
band
DAC
ADC
Combi
ner
TX Radio
Frequency
Synthesizers
AR9271
GPIOs
USB 2.0
SPI
Control
Memory
Control
USB
DMA
CPU
MAC
M
e
m
o
r
y
RX
Radio
Bias / Control
RF
Switch
2.2 General Requirements
2.2.1 IEEE 802.11b Section
# Feature Detailed Description
2.2.1.1 Standard
y
IEEE 802.11b
2.2.1.2 Radio and
Modulation
Schemes
y
DQPSK, DBPSK, DSSS, and CCK
2.2.1.3 Operating
Frequency
y
2400 ~ 2497MHz ISM band
2.2.1.4 Channel Numbers
y
11 channels for United States
13 channels for Europe Countries
14 channels for Japan
2.2.1.5 Data Rate
y
11, 5.5, 2, and 1Mbps
2.2.1.6 Media Access
Protocol
y
CSMA/CA with ACK
2.2.1.7 Transmitter Output
Power at Antenna
Connector
y
Typical RF Output Power at each RF chain, Data Rate and at room
Temp. 25degree C
y
17dBm(
±
2dB) at 1,2,5.5,11Mbps
2.2.1.8 Receiver Sensitivity
at Antenna
Connector
y
Typical Sensitivity at Which Frame (1000-byte PDUs) Error Rate =
8%
y
–90dBm at 1Mbps
y
–88dBm at 2Mbps
y
–86dBm at 5.5Mbps
y
–84dBm for 11Mbps
2.2.2 IEEE 802.11g Section
# Feature Detailed Description
2.2.2.1 Standard
y
IEEE 802.11g