I agree. If you had 5-bits of phase control (11.25 degree steps) the noise would be 24 dB down.
73,
John KD6OZH
----- Original Message ----- From: "Franklin Antonio" antonio@qualcomm.com To: K3IO@verizon.net Cc: "AMSAT Eagle" Eagle@amsat.org Sent: Friday, March 23, 2007 19:53 UTC Subject: [eagle] Re: Eagle Microwave Antenna Arrays -- mechanical concepts
At 08:52 AM 3/23/2007, Tom Clark, K3IO wrote:
IMHO, this is a REALLY BAD :-P idea because there will be abrupt phase and amplitude discontinuities when switching from one beam to the next as the s/c spins.
You should not fear small phase discontinuities from steps in the beam forming. These phase jumps will be very small, and will have only a tiny effect on coded BPSK modulation.
We do not need to do anything fancy to eliminate small phase steps that will have no impact on performance.
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