Talk:One of many signals near 877 MHz
Yep, this is definitely cdma2000. Its for 3G mobile, such as cell phones. A 1.25 MHzMegaHertz (MHz) 10^6 Hz span for both the 95 and the CDMACode Division Multiple Access, or just by themselves. Uses a temporal slot to send signaling, voice, and text and data at 8000 bpsBits per second (bps) or 9600 bpsBits per second (bps) Due to its slots, it creates a rather weird temporal data sound when heard in AMAmplitude Modulation, since it uses QAMQuadrature Amplitude Modulation and CDMACode Division Multiple Access modulations. Kind of like 4G LTE. Uses 824-849, 869-894 MHzMegaHertz (MHz) 10^6 Hz. Ywsia1 (talk)
Thanks for the ID. CDMACode Division Multiple Access has been on my list of things to add for a very long time. --Cartoonman (talk) 09:08, 10 September 2016 (NZST)
Actually, is there a difference between IS-95 and CDMA2000 at the physical layer (modulation)? like, is the signal this person captured IS-95 or CDMA2000? I know CDMACode Division Multiple Access in the US uses bandwidth of 1.25 MHzMegaHertz (MHz) 10^6 Hz. --Cartoonman (talk) 09:11, 10 September 2016 (NZST)
Well, this is actually both the 2000 and the is95 itself. IS95 is slower, but still uses the same technique as the 2000. I would assume the is95 is the brighter orange/yellow, while the darker red is the 2000. They do not sound the same, but uses similar slots It gives a very weird "marching" type of beat when slots are processed. Many noises are also present. You can't really hear all noises it lest if in AMAmplitude Modulation. Aka the QAMQuadrature Amplitude Modulation. a RAW sample can be provided too. Ywsia1 (talk) UPDATE: This IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. file is not as clear of harmonics and temporal slots as what I usually hear in my area. But it does sound exactly what I think it sounds like in my state of Michigan. Once I get my new SDR with the telescoping antenna ill recieve it a lot better, plus ill have my phone right by the antenna so as to get the 3G sound better.
