原标题：Quantenna QHS600 11.n 4x4 MIMO解决方案

　　Quantenna公司的QHS600是业界首个全IEEE 802.11.n 4x4 多输入多输出(MIMO)单片解决方案, 可提供多达4路视频流,全高清(HD)质量和1080p分辨率,以及动态数字波束成形,网状网络,通路监测和优化.和其它WLAN解决方案相比,性能提高 25dB,主要用在5 GHz 无线HD视频桥,无线HDTV 发送/接收,用于STB,HDTV和住宅区网关的GMII/MII模块以及带功放的家庭NAS等.本文介绍了QHS600 主要特性和优势, 参考设计框图和应用框图.

　　The QHS600 is a fully integrated, single-chip solution with the performance and reliability to deliver up to four video streams, anywhere in the home, with full HD quality and 1080p resolution.

　　As the world’s first Full-11n™ solution, the QHS600 device incorporates a significant selection of the IEEE 802.11n optional technical specifications including 4x4 Multiple Input Multiple Output (MIMO), dynamic digital beamforming, mesh networking and channel monitoring and optimization. These Full-11n features ensure up to 25 dB performance improvement as compared to earlier WLAN solutions, while also enabling QHS600-based products to interoperate with existing Wi-Fi devices.

　　The QHS600 delivers five times the coverage of other 802.11n solutions, across multiple rooms and devices, eliminating problems with dead spots. It uses digital beamforming in the IEEE 802.11a/n 5 GHz frequency band to deliver up to 300 Mbps PHY/data link speeds, across up-to-200-foot distances, with optimal video quality thanks to near-zero packet error rates. It also minimizes system latencies for real-time applications such as online bidirectional video-game controllers, and can operate in point-to-multipoint mode to support more than 10 concurrent HD streams.

　　The QHS600 chipset reduces bill of materials (BOM) costs by integrating functionality that would otherwise require an additional front-end module (FEM), including four RF transceivers and associated power amplifiers (PAs) and low noise amplifiers (LNAs). The QHS600 also features an advanced MIMO baseband and media access controller (MAC), and provides tremendous processing capability using dual ARM CPUs and DSPs along with application-specific hardware acceleration.

　　The QHS600 device is supported by a Wireless Video Bridge Reference Design Kit (RDK) including an evaluation board plus cables for connecting it to an external controller through Ethernet, Gigabit Ethernet or USB 2.0 ports. The Software Development Kit (SDK) implements all networking and device discovery/connectivity functionality for a wireless 802.11n video bridge module. The kit also includes a full test suite of specialized video-over-wireless radio frequency (RF) calibration and performance-characterization software, including an easy-to-use graphical user interface (GUI).

　　World’s First Full-11.n 4x4 MIMO Solution

　　The Quantenna QHS600x Reference Design Kit (RDK) is a high-performance evaluation kit implementing Quantenna’s QHS600 IEEE 802.11n Wireless LAN chipset solution. The QHS600x RDK enables wireless LAN applications evaluation. The QHS600x Reference Design includes radio and host adapter boards.

　　Applications include wireless video bridge for video delivery throughout the home and ultra-reliability over Wi-Fi. Operating in the IEEE 802.11a/n 5GHz frequency band, the QHS600x supports high PHY/data link speed with superior wireless data throughput with maximum range.

　　The RDK boards use Quantenna’s QHS600 802.11n wireless LAN chipset solution with baseband/MAC and RF ICs. Using advanced 4x4 MIMO technique and Dynamic Digital Beamforming, the QHS600x delivers ultra-reliable HD-quality video to multiple rooms and devices simultaneously.

　　The QHS600x consists of a radio GMII module connected via a mPCI connector to a host adapter board. The RDK enables straightforward board boot, bringup, and program execution. The Reference Design board has integrated functions for various I/O interfaces, including Gigabit Ethernet, DDR SDRAM, Flash, USB 2.0 OTG, ARM JTAG debug port, GPIOs, Serial port and four antenna ports.

　　QHS600 主要特性:

　　4x4 MIMO, Explicit Dynamic and Implicit Digital Tx Beamforming

　　Integrated ARM-based network CPUs with hardware assist to manage multiple simultaneous 802.11a/n connections Gigabit Ethernet interface, connected to the standard mPCI connector through the defined UTP interface

　　Integrated DSP engine for higher layer content and privacy security acceleration

　　HTTP-based GUI management, automatically brings up web-based GUI control from on-board flash Ultra-simplified setup, including auto detection ofaccess point and bridge mode, and security precon-figuration with single-touch Wi-Fi Protected Setup (WPS) when new devices are added to the network

　　IGMP Snooping, Multicast-to-Unicast conversion

　　TR-069 standard remote management

　　Security support for WEP, WPA, WPA2, TKIP

　　Channel state aware link management using real time spectrum analysis for sustained link robustness

　　Space Time Block Coding (STBC)

　　QHS600 优势:

　　Wireless video delivery to every corner throughout the home:

　　Ultra-reliable video delivery over Wi-Fi throughout the home, no more dead spots

　　Builds a carrier-class residential gateway, delivering 5GHz broadband video distribution

　　Point to Multipoint solution supporting more than 10 concurrent HD streams

　　At least 200 feet coverage

　　Fast and reliable high quality wireless video delivery:

　　Up to 300 Mbps PHY/Data link speed with digital beamforming enabled

　　Near-zero Packet Error Rate

　　Up to 25 dB performance improvement over existing WLAN configurations

　　Uses four standard omni-directional antennas

　　Easy installation, centralized management and automatic configuration:

　　Simple self-installation

　　Auto detection of AP and Bridge mode

　　Full Linux stack centralized real-time status, PHY statistics and management

　　WPS for automatic secure configuration, User GUI for custom configurations

　　Advanced web GUI for RF test and verification

　　QHS600 应用:

　　5 GHz Wireless HD Video Bridge

　　Wireless HDTV Tx/Rx

　　GMII/ MII modules for:

　　“STB HDTV with integrated video decoder

　　Residential Gateways (cable, PON, xDSL etc.)”

　　Video Surveillance

　　Home NAS with AP

　　QHS600x-802.11n主要指标:

　　Frequency Band: 4.900-5.850 GHz

　　I/O Interfaces: GMII, MII, Ethernet, USB 2.0 OTG

　　Memory Interface: DDR1 SDRAM, parallel Flash

　　Peripheral Interfaces: GPIOs, UART, SPI, I2C

　　Wireless Standards: 802.11a/n, 802.11i (WEP, WPA/WPA2, RADIUS), 802.11d, 802.11e

　　(WMM, WMM-PS), 802.11j, 802.11h, 802.11k, draft 802.11s

　　40 MHz crystal oscillator, +/- 20 ppm (XOSC)

　　LED status: Ethernet, Wireless LAN, Wireless Link Quality

　　Power requirement for adapter card: 12V DC

　　Four 50 ohm, 5GHz u.FL antennas connectors

　　External PA and LNA for optimal range & performance

　　图1.QHS600x参考设计外形图

　　图2.QHS600x参考设计框图

　　图3.QHS600应用方框图