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Single-Chip IEEE 802.11a/b/g/n 2T2R WLAN Controller with PCI Express Interface
General Description

The Realtek RTL8192DE-VC is a highly integrated single-chip MIMO (Multiple In, Multiple Out) Wireless LAN (WLAN) PCI Express network interface controller complying with the IEEE 802.11n specification. It combines a configurable dual MAC, 2T2R capable baseband and 2.4GHz/5GHz band RF in a single chip. The RTL8192DE-VC provides a complete solution for a high-performance wireless client.

The RTL8192DE-VC implements dual MACs via PCI Express multi-function capability. The dual MAC feature allows the RTL8192DE-VC to access two different wireless networks and to act as a WiFi station and an AP concurrently. The RTL8192DE-VC also supports WiFi Direct and can easily build a WiFi P2P PAN network.

The RTL8192DE-VC baseband implements Multiple Input, Multiple Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) with two transmit and two receive paths (2T2R). Features include two spatial stream transmissions, short Guard Interval (GI) of 400ns, spatial spreading, and support for both 20MHz and 40MHz channel bandwidth. The RTL8192DE-VC also provides one spatial stream Space-Time Block Code (STBC) to extend the transmission range. At the receiver, extended range and good minimum sensitivity is achieved by having receiver diversity up to 2 antennas.

For legacy compatibility, Direct Sequence Spread Spectrum (DSSS), Complementary Code Keying (CCK) and OFDM baseband processing are included to support all IEEE 802.11a, 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 the higher data rates of 54Mbps and 300Mbps for IEEE 802.11g and 802.11n MIMO OFDM respectively.

The RTL8192DE-VC 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. For better detection quality, receive diversity with Maximal-Ratio-Combining (MRC) applying up to two receive paths is implemented. Robust interference detection and suppression are provided to protect against Bluetooth, cordless phone, and microwave oven interference.

Receive vector diversity for multi-stream application is implemented for efficient utilization of the MIMO channel. 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 RTL8192DE-VC supports fast receiver Automatic Gain Control (AGC) with synchronous and asynchronous control loops among antennas, antenna diversity functions, and adaptive transmit power control functions to obtain better performance in the analog portions of the transceiver.

The RTL8192DE-VC MAC supports 802.11e for multimedia applications, 802.11i and WAPI (Wireless Authentication Privacy Infrastructure) 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, U-APSD, and MIMO power saving reduce the power wasted during idle time, and compensate for the extra power required to transmit MIMO OFDM. The RTL8192DE-VC provides simple legacy and 20MHz/40MHz co-existence mechanisms to ensure backward and network compatibility.

  • CMOS MAC, Baseband PHY, and RF in a single chip for IEEE 802.11a/b/g/n compatible WLAN
  • Complete 802.11n MIMO solution for 2.4GHz and 5GHz band
  • 2x2 MIMO technology for extended reception robustness and exceptional throughput
  • Maximum PHY data rate up to 144.4 Mbps using 20MHz bandwidth, 300Mbps using 40MHz bandwidth
  • Complies with 802.11n specification
  • Backward compatible with 802.11a/b/g devices while operating at 802.11n data rates
    Host Interface
  • Complies with PCI Express 1.1
    Standards Supported
  • IEEE 802.11a/b/g/n compatible WLAN
  • IEEE 802.11e QoS Enhancement (WMM)
  • IEEE 802.11i (WPA, WPA2). Open, shared key, and pair-wise key authentication services
  • IEEE 802.11h TPC, Spectrum Measurement
  • IEEE 802.11k Radio Resource Measurement
  • WAPI (Wireless Authentication Privacy Infrastructure) certified.
    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
  • MIMO power saving mechanism
  • Channel management and co-existence
  • Multiple BSSID feature allows the RTL8192DE-VC to assume multiple MAC identities when used as a wireless bridge
  • Supports Wake-On-WLAN via Magic Packet and Wake-up frame
  • Transmit Opportunity (TXOP) Short Inter-Frame Space (SIFS) bursting for higher multimedia bandwidth
  • Dual MAC architecture allows dual band or dual network access, or operation as a station and an AP concurrently
  • WiFi Direct supports wireless peer to peer applications
    Peripheral Interfaces
  • General Purpose Input/Output (12 pins)
  • Three configurable LED pins
  • Configurable Bluetooth Coexistence Interface
    PHY Features
  • IEEE 802.11n MIMO OFDM
  • Two Transmit and Two Receive paths (2T2R)
  • 20MHz and 40MHz bandwidth transmission
  • Supports 2.4GHz and 5GHz band channels
  • Short Guard Interval (400ns)
  • DSSS with DBPSK and DQPSK, CCK modulation with long and short preamble
  • OFDM with BPSK, QPSK, 16QAM, and 64QAM modulation. Convolutional Coding Rate: 1/2, 2/3, 3/4, and 5/6
  • Maximum data rate 54Mbps in 802.11a/g and 300Mbps in 802.11n
  • OFDM receive diversity with MRC using up to 2 receive paths. Switch diversity used for DSSS/CCK
  • Hardware antenna diversity
  • Selectable digital transmit and receiver FIR filters
  • Programmable scaling in transmitter and receiver to trade quantization noise against increased probability of clipping
  • Fast receiver Automatic Gain Control (AGC)
  • On-chip ADC and DAC
  • QFN76 9x9mm package
  • 11n Dual-Band 2x2 RF Application
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