Help needed in HF Signal catching

[Ow@i$]

WWV is a time signal transmitted by United states. There is a signal BPM also that is transmitted by Chinese. Both are transmitted on 10 MHz. I am receiving BPM signal on my receiver with a 10 MHz designed antenna specifically for the application. I live in Pakistan and Chinese are my immediate neighbors, so obviously Signal strength will be higher as compare to WWV what if I don't want BPM. I want to receive WWV..!!! what can be done in this regard ... i mean change in antenna or receiver??
Any help appreciated

 

[Mityan]

Maybe, make a directional antenna to deny signal from china and to amplify from US?

 

[Ow@i$]

It will not work as both the signals are transmitted by the principle of sky wave transmission..... they are not directed, else i would have used it!!!!

 

[biff44]

good luck! If you have a chance at all, you will need multiple antennas phased to null the Chinese signal and amplify the US signal. As you will only get 30 dB nulling on a good day....not sure if that is enough.

 

[krp]

WWV transmits on several frequencies 24 hours per day;

https://www.nist.gov/pml/div688/grp40/wwv.cfm

BPM transmits on the same frequencies but, in the case of some frequencies, not 24 hours/day;

https://en.wikipedia.org/wiki/BPM_(time_service)

You could, at least, receive WWV in the periods when BPM is silent.

 

[Mityan]

And what is the receiver? A've read a little about these two signal on wiki. It seems they are different. Building a digital sample of WWV tones you may be able to detect them by means of correlation technique (or mathced filtering)? Or maybe time windows?

 

[Ow@i$]

@Krp

I know there are other frequency options, but 10 MHz is that particular frequency that is independent of timing !! I mean frequency below 10 MHz can't travel well in night... and above 10 MHz can't travel well in day!! 10 MHz is chosen that's why!!!

@Mityan

I am designing a Superhet one .. I designed TRF but it didn't worked for BPM also!!!
just for testing I am using Kenwood R-1000 !!!