Article: 52414 of rec.radio.amateur.digital.misc From: nospam@w6yx.stanford.edu (Alan) Subject: Re: Amazing Date: Wed, 1 Jun 2005 06:19:58 +0000 (UTC) Message-ID: References: writes: >You are right that "Exceptional claims require exceptional proof." > >You are also right that at this time, due to contracts with the private side >investors, the project details can not be made public. After all, when a >group of companies take a look at a research project grant proposal and >decide to give a consortium of schools several million $ to do the research, >they are not doing that because they are the proverbial "Good Corporate >Citizens"... They want to make money on the deal. More precisely, they >EXPECT to make money on the deal. > >I don't think (I hope) that the investors will boil me in oil for saying >that Sunday, some of the grad students were working in the Faraday lab and >reached a 5 second burst of 125 Mbps over a 30 meter run in the 10 GHz band >with a 3 db bandwidth of 145 KHz. This has not been verified or replicated >as of yet by another team. Also note that the signal is very, well, messy, >with an unfiltered 65 db bandwidth closer to 145 MHz. However, they used a >fairly sharp band-pass filter when they measured their throughput... At >least according to the report that was sent to me last night. Note that when this started out, you said: > In about 1989 there was a local ham (now SK named Frank whose last name and > call I can not remember now) who came to me with a design for a device that > would plug into a 100BaseT NIC and generate low power (about 50 mW as I > recall) at either 70 cm or 23 cm. He wanted my input on the protocol stack > (networking is my thing). Effectively, the device simply sent and received > TCP/IP over an RF Ethernet link. He had built a pair of prototypes that > worked very well. He then built a simple amplifier to get the RF up to about > 10 watts and it worked very well between his house and mine, about 8 miles > apart, on J-Poles. We were able to get about 80 Mbps at 23 cm. >... > I wish that I still had the schematic for the prototype that he gave me, but > over the course 15+ years and 3 cross-country moves, I have misplaced them. > It would need significant updating... The prototypes were xtal controlled > and did not use SS. I would think (I am a network engineer, not RF or > electronics!) that the system could benefit from DDS, DSP, and SS > procedures. This seems somewhat different than the "university research project". Why the change in story? Alan Article: 52415 of rec.radio.amateur.digital.misc From: "Caveat Lector" References: <0O6dnX7E4aGaUjzfRVn-hQ@rogers.com> Subject: Re: digital signal processing Message-ID: Date: Sat, 4 Jun 2005 09:13:34 -0700 Hi Larry -- Kenwood has an in depth manual on DSP - see TS-870S URL: http://www.kenwood.net/?do=SupportFileCategory&FileCatID=5 -- CL -- I doubt, therefore I might be ! "larry" wrote in message news:0O6dnX7E4aGaUjzfRVn-hQ@rogers.com... > Greetings > > I have problem which I am hoping this group may be able to help me out > with... First a bit about me to help you out... > > I was licenced back in 1964 as ve3fxq.. and still have that same > callsign... > > I was in ham radio when sideband was more or less came in.. I was around > when fm and fm repeaters came in.. I was around when packet came in.. > etc... > > However I seemed to have left ham radio around the mid 90's... Now during > the past couple of years, I have been trying to come back... > > I have noticed, however, a strong element of hams talking about digital > signal processing... They say that it allows you to do thinks like > controlling the selectivity much better than we used to do with filters, > etc... > > Here is where I need the help... I have looked at websites, which talk > about dsp as if I already know what it is.. and try to sell me on a chip > or > kit or board which is supposted to do dsp.. but I am still trying to find > out how dsp can help me ..... > > Is there a website which esplains dsp to someone who know basic receiver > consepts and knows 1's and 0's but need help in understanding dsp... > > Larry ve3fxq > > Article: 52416 of rec.radio.amateur.digital.misc Subject: Re: digital signal processing References: <0O6dnX7E4aGaUjzfRVn-hQ@rogers.com> From: haynes@alumni.uark.edu (Jim Haynes) Message-ID: Date: Sat, 04 Jun 2005 18:40:14 GMT And then if you want to play with it you might start with the digital modes that use the PC and soundcard to create a modem. If you use Linux the stuff is open source so you can look at the code. Even in Windows there may be some open-source stuff to look at. -- jhhaynes at earthlink dot net Article: 52417 of rec.radio.amateur.digital.misc From: Johnny Williams Subject: Please email me Message-ID: Date: Sat, 4 Jun 2005 16:08:54 -0400 I'm just a lonely ham. Nobody wants to play radio with me. Please e-mail me. I'm tired of emailing myself, it's no fun anymore. Johnny Williams kf4vgx@sc.rr.com