Min and Max data rates for BPSK signal

[afz23]

I am trying direct BPSK on a 1GHz carrier signal . The signal will be transmitted via air medium using an antenna.
I have some limitation on radiated power level, so I can not have high data rates as it will reduce available RF link margin.

I wanted to reduce the data rate and see upto what data rate I can get acceptable BER.?
It is obseved that BER(10^-6) is good upto 10kbps data rate, below 10kbps say 2kbps BER is just 10^-2,which is not acceptable.

Please throw light on this onservation, and suggest what need to be done to transmit 1kbps with acceptable BER at 1GHz carrier frequency.?

 

[FvM]

It is obseved that BER(10^-6) is good upto 10kbps data rate, below 10kbps say 2kbps BER is just 10^-2,which is not acceptable.

Contradiction in terms, please clarify.
Also, the question is meaningless without specifying a demodulation method. BER is always related to an (unsaid) SNR.

 

[afz23]

Contradiction in terms, please clarify.
Also, the question is meaningless without specifying a demodulation method. BER is always related to an (unsaid) SNR.

After BPSK demodulation , we require SNR of minimum 9.5dB.

 

[kaz1]

After BPSK demodulation , we require SNR of minimum 9.5dB.

You are asking how to reduce data rate but at same time you did reduce data rate from 10KBps to 2kbps and below?

Anyway, did you change your filtering? shaping filter or channel filter? if so you will lose data. The correct way to reduce data rate is to have symbol rate (clock) reduced. Then you can shape/upsample to 1GH RF.
data rate for BPSK = symbol rate => (BW = symbol clock/2 * 2)