How to increase reception sensitivity in BLE stack

Sunil Mankame

Other Parts Discussed in Thread: CC2541

Hi,

I am trying to increase the reception sensitivity of BLE signal at peripheral device end as I am receiving weaker signals from central device at a distance.

I am using the BLE stack of CC2541 device

Can I use the following statement to increase the reception gain?

llSetRxGain(LL_EXT_RX_GAIN_HIGH);

Regards,

Sunil

over 9 years ago

0 YiKai Chen over 9 years ago

Guru 735695 points

You should use HCI_EXT_SetRxGainCmd to do this.

0 CHS over 9 years ago

TI__Mastermind 18780 points

What sensitivity do you have now? And what range do you get?

0 Sunil Mankame over 9 years ago in reply to YiKai Chen

Intellectual 300 points

Hi Yikai,

Thanks for your reply.

So, I will try calling the following as per your suggestion:

HCI_EXT_SetRxGainCmd(LL_EXT_RX_GAIN_HIGH);

Can you suggest the ideal place where it can be called from?

Is HCI_Init() the right place to insert this statement?

Regards,

Sunil

0 YiKai Chen over 9 years ago in reply to Sunil Mankame

Guru 735695 points

I would suggest you to put it in your application init function.

0 Sunil Mankame over 9 years ago in reply to Sunil Mankame

Intellectual 300 points

Oh! I think I should use HCI_EXT_RX_GAIN_HIGH instead of LL_EXT_RX_GAIN_HIGH as the parameter.
So, I have corrected the statement as below:
HCI_EXT_SetRxGainCmd(HCI_EXT_RX_GAIN_HIGH );
And, I will call this from HCI_Init().

Regards,
Sunil

0 Sunil Mankame over 9 years ago in reply to CHS

Intellectual 300 points

Hi Charlotte,

I believe it is set to LL_EXT_RX_GAIN_STD currently.
I get range in the open space up to 50ft. But if I try in a room with some obstructions and interferences, it comes down to 15 ft.

Regards,
Sunil

0 Sunil Mankame over 9 years ago in reply to YiKai Chen

Intellectual 300 points

Thank you Yikai.

Regards,
Sunil

0 YiKai Chen over 9 years ago in reply to Sunil Mankame

Guru 735695 points

You are welcome.

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How to increase reception sensitivity in BLE stack