RTL8188RE中文資料瑞昱數(shù)據(jù)手冊PDF規(guī)格書

General Description

The Realtek RTL8188RE-GR is a highly integrated single-chip Wireless LAN (WLAN) PCI Express

network interface controller compatible with the 802.11n specification. It combines a MAC, a 1T1R

capable baseband, and RF in a single chip. The RTL8188RE provides a complete solution for a high

throughput performance wireless client.

The RTL8188RE baseband implements Orthogonal Frequency Division Multiplexing (OFDM) with 1

transmit and 1 receive path and is compatible with the IEEE 802.11n specification 2.0. Features include one

spatial stream transmission, short guard interval (GI) of 400ns, spatial spreading, and transmission over

20MHz and 40MHz bandwidth.

For legacy compatibility, Direct Sequence Spread Spectrum (DSSS), Complementary Code Keying (CCK)

and OFDM baseband processing are included to support all IEEE 802.11b and 802.11g data rates.

Differential phase shift keying modulation schemes, DBPSK and DQPSK with data scrambling capability,

are available, and CCK provides support for legacy data rates, with long or short preamble. The high-speed

FFT/IFFT paths, combined with BPSK, QPSK, 16QAM, and 64QAM modulation of the individual

subcarriers and rate compatible punctured convolutional coding with coding rate of 1/2, 2/3, 3/4, and 5/6,

provide higher data rates of 54Mbps and 150Mbps for IEEE 802.11g and 802.11n OFDM respectively.

The RTL8188RE builds in an enhanced signal detector, an adaptive frequency domain equalizer, and a

soft-decision Viterbi decoder to alleviate severe multi-path effects and mutual interference in the reception

of multiple streams. Robust interference detection and suppression are provided to protect against

Bluetooth, cordless phone, and microwave oven interference.

Efficient IQ-imbalance, DC offset, phase noise, frequency offset, and timing offset compensations are

provided for the radio frequency front-end. Selectable digital transmit and receive FIR filters are provided

to meet transmit spectrum mask requirements and to reject adjacent channel interference, respectively.

The RTL8188RE supports fast receiver Automatic Gain Control (AGC) with synchronous and

asynchronous control loops among antennas, antenna diversity functions, and adaptive transmit power

control function to obtain the better performance in the analog portions of the transceiver.

The RTL8188RE MAC supports 802.11e for multimedia applications, 802.11i for security, and 802.11n for

enhanced MAC protocol efficiency. Using packet aggregation techniques such as A-MPDU with BA and

A-MSDU, protocol efficiency is significantly improved. Power saving mechanisms such as Legacy Power

Save, and U-APSD, and APSD, reduce the power wasted during idle time, and compensates for the extra

power required to transmit OFDM. The RTL8188RE provides simple legacy and 20MHz/40MHz

co-existence mechanisms to ensure backward and network compatibility.

Features

General

64-pin QFN

CMOS MAC, Baseband PHY, and RF in a

single chip for IEEE 802.11b/g/n compatible

WLAN

Complete 802.11n solution for 2.4GHz band

72.2Mbps receive PHY rate and 72.2Mbps

transmit PHY rate using 20MHz bandwidth

150Mbps receive PHY rate and 150Mbps

transmit PHY rate using 40MHz bandwidth

Compatible with 802.11n specification

Backward compatible with 802.11b/g

devices while operating in 802.11n mode

Host Interface

Complies with PCI Express Base

Specification Revision 1.1

Standards Supported

IEEE 802.11b/g/n compatible WLAN

IEEE 802.11e QoS Enhancement (WMM)

IEEE 802.11h TPC, Spectrum Measurement

802.11i (WPA, WPA2). Open, shared key,

and pair-wise key authentication services

Cisco Compatible Extensions (CCX) for

WLAN devices

MAC Features

Frame aggregation for increased MAC

efficiency (A-MSDU, A-MPDU)

Low latency immediate High-Throughput

Block Acknowledgement (HT-BA)

Long NAV for media reservation with

CF-End for NAV release

PHY-level spoofing to enhance legacy

compatibility

Power saving mechanism

Channel management and co-existence

Multiple BSSID feature allows the

RTL8188RE to assume multiple MAC

identities when used as a wireless bridge

Transmit Opportunity (TXOP) Short

Inter-Frame Space (SIFS) bursting for higher

multimedia bandwidth

Peripheral Interfaces

General Purpose Input/Output (11 pins)

4-wire EEPROM control interface (93C46)

Three configurable LED pins

Configurable Bluetooth Coexistence

Interface