Now that you know what the MCS standard is, now you just need to figure out whether the manufacturer followed the standard. There is no law that says they need to, and it could be considered a value add to improve on it.
A perfect example is the discussion I was having simultaneously in the 900 thread. Does the radio TX on both antenna polarities when in mode MCS 0-7? One party stated they though selection MCS 0-7, disabled transmission on the second polarity. According to the "standard", it should transmit on both polarities in MCS0-7. Single Chain having the meaning of 1 data set. Where in MCS0-7 the "same" data set would be transmitted accross both polarities creating two spacial streams of the same data, with an attempt to reduce error rate, but not increase speed, other than allow a higher modulation because less error rate. Tom DeReggi RapidDSL & Wireless, Inc IntAirNet- Fixed Wireless Broadband ----- Original Message ----- From: "Robert Canary" <[email protected]> To: "WISPA General List" <[email protected]> Sent: Sunday, September 25, 2011 6:31 PM Subject: Re: [WISPA] UBNT > Thank you, that's the most (and the best) info I have gotten on the UBNT > from anyone. > > Could you explain what the "MCS is, and why one would use it? > > Robert Canary > OCDirect Electrical-Datacomm > (866) 594-0786 Fax > (270) 955-0362 Voice > > ----- Original Message ----- >> At 9/25/2011 02:23 PM, Robert Canary wrote: >> >Keeping a link active versus maintaining throughput under divers >> >conditions is two different things. For the money paid I would go >> >with something like Alvarion. But then again, after 12 years, I >> >would not invest big dollars in CPE or Access points. Only in the >> >backhauls and infrastructures. >> > >> >The only reason I have not went UBNT, I have found much feed back on >> >how they deal with interference, I like Frequency Hopper (FH) they >> >keep a decent link through the most divers environments. But how >> >does UBNT deal with interference? >> >> UBNT uses chips that are essentially software-defined radios. They >> implement the 802.11 G, A and N modulation. G and A are a fairly >> simple OFDM. -N is an OFDM with MIMO capability and some additional >> features. FH and DS are both older spread spectrum techniques; OFDM >> is wideband, but not really spread spectrum. >> >> The N specs in particular (which work on both 2.4 and 5 GHz bands) >> include a lot of modulation options ("MCS"). So you can select the >> modulation that works best on the link in question, and choose 5, 10, >> 20 or 40 MHz channels. >> >> -- >> Fred Goldstein k1io fgoldstein "at" ionary.com >> ionary Consulting http://www.ionary.com/ >> +1 617 795 2701 >> >> >> >> -------------------------------------------------------------------------------- >> WISPA Wants You! Join today! >> http://signup.wispa.org/ >> -------------------------------------------------------------------------------- >> >> WISPA Wireless List: [email protected] >> >> Subscribe/Unsubscribe: >> http://lists.wispa.org/mailman/listinfo/wireless >> >> Archives: http://lists.wispa.org/pipermail/wireless/ >> > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: [email protected] > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
