From owner-freebsd-wireless@FreeBSD.ORG Wed Feb 27 00:59:57 2013 Return-Path: Delivered-To: freebsd-wireless@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id E3515515 for ; Wed, 27 Feb 2013 00:59:57 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: from mail-wg0-x229.google.com (mail-wg0-x229.google.com [IPv6:2a00:1450:400c:c00::229]) by mx1.freebsd.org (Postfix) with ESMTP id 77CB2E6F for ; Wed, 27 Feb 2013 00:59:57 +0000 (UTC) Received: by mail-wg0-f41.google.com with SMTP id ds1so4865345wgb.0 for ; Tue, 26 Feb 2013 16:59:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:x-received:sender:date:x-google-sender-auth:message-id :subject:from:to:content-type; bh=gglyReKgXax2k9U9maKGgbYbVyiNkUuZ55JJUqINWbc=; b=e2986fDNxw5TeKNRl7uZRlWEWlL9XPk5qarDdvOtmzDBkOf5Tt5uEk5EjsRFEbih1P wWaaaBw9j4SK9xNnTrmoF8j72407rJiEVIEcypJcSgyACunEJmJJOYdtacKA9Rf6iVHb tusFJhjLRB//63I1LRp8JNzKmMIRXTDkAazTCzWgOQnuqgrmft12wr/PM5YLtc8C+pIw vJKoQkFv0p+2L+x4+ZkMnPReJlFxOTAspPZph8htow7C05afiiU+AcZzcgAURL/Xa4CB fyuxPq/KyoV84IwR1UHdc5wiE2G0X0SeZsBiw9Zfz0yJFTV0+z9T1ehcFpj8frxC8D3v XikA== MIME-Version: 1.0 X-Received: by 10.194.20.40 with SMTP id k8mr506582wje.16.1361926796541; Tue, 26 Feb 2013 16:59:56 -0800 (PST) Sender: adrian.chadd@gmail.com Received: by 10.216.114.201 with HTTP; Tue, 26 Feb 2013 16:59:56 -0800 (PST) Date: Tue, 26 Feb 2013 16:59:56 -0800 X-Google-Sender-Auth: onm2PrV5ZVyG9_Y2rmS_UGFuBHg Message-ID: Subject: [CFT] STBC is enabled for AR9280 and later From: Adrian Chadd To: freebsd-wireless@freebsd.org Content-Type: text/plain; charset=ISO-8859-1 X-BeenThere: freebsd-wireless@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Discussions of 802.11 stack, tools device driver development." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 27 Feb 2013 00:59:57 -0000 Hiya, I've just enabled STBC TX and RX on the AR9280 and later. * STBC TX requires two chains to work right. So enabling a single chain only or the single chain NICs (AR9285) won't work; * STBC RX works with one chain but you really need two chains to get the benefit; * STBC is only supported for single-stream rates (MCS 0 -> 7.) So, for AR9280 and AR9287 users, STBC should work for you now out of the box. AR9285 users - you can receive STBC but it won't give you any benefits. The AR5416, AR9130 and AR9160 NICs don't support STBC. When the AR9300 HAL is released, STBC will work for all of those NICs. What does it mean? It should give increased sensitivity/performance at the lower MCS rates which should translate to a generally better wifi experience. THanks, Adrian