Years ago I dug into the LTE protocol to see what it really was. My recollection is it is a collection of a bunch of different modulation formats that can be used as appropriate. I think it was expandable and built for future flavors of modulation. Seems like one of the formats was very much like WiMax. Again at least 5-7 years since I read that document.
From: Bill Prince Sent: Wednesday, March 04, 2015 12:41 PM To: [email protected] Subject: Re: [AFMUG] New feedback (Patrick Leary) What are the significant differences between LTE and WiMax? They're both OFDM, they're both MIMO. I guess that LTE is 4x4 (I don't know)? Just wondering what the technical challenges might look like. bp <part15sbs{at}gmail{dot}com> On 3/4/2015 11:36 AM, Ken Hohhof wrote: My understanding was that it was an FPGA and software based platform. And that PW bought the design from Design Arts Networks so they could modify it, as opposed to just licensing the design. Not just adding extensions to drivers for an ASIC. I think the point Patrick is trying to make is Telrad designed their hardware from the outset to handle both WIMAX and LTE, with WIMAX coming out first, but same HW being upgradable via SW to LTE. And that now they have actually done it, which is significant, because many engineering teams in history have said “it’s a SMOP (small matter of programming)” and then had to admit defeat and change the hardware. From: Jon Auer Sent: Wednesday, March 04, 2015 1:15 PM To: Animal Farm Subject: Re: [AFMUG] New feedback (Patrick Leary) Purewave claiming SDR because they can add proprietary extensions seems like Ubiquiti claiming to be SDR because they licensed Atheros driver code so they could make AirMax. I always thought SDR meant the signal processing, anything to do with making sense of the RF, happened in software (FPGA counts!). Ettus Research's USRP is a example on TX/RX. RTL-SDR USB sticks on the RX only. E.g. If, in theory, the manufacturer can reprogram it to be a FM radio (maybe you replace the transciever/amps first though). On Wed, Mar 4, 2015 at 12:43 PM, Ken Hohhof <[email protected]> wrote: Why is it not software defined? Because DAN owned the core WIMAX software? Purewave claimed to have purchased the rights to make their own mods, that was one of their claimed advantages over PMP320. Not sure what Mercury would say now. But don't they have a proprietary enhanced (but not LTE) version now? I don't see how they do that if it's not a SDR. I assume we are talking about the part of Purewave that went to Mercury, not the part that went to Redline. If you mean was it designed to do both WIMAX and LTE with just a different software load, no, they never claimed that AFAIK. -----Original Message----- From: Stefan Englhardt Sent: Wednesday, March 04, 2015 12:30 PM To: [email protected] Subject: Re: [AFMUG] New feedback (Patrick Leary) PW is not SDR based So call their Distributors and tell them to change their announcements. Just google Purwave and SDR and you find some.
