The number of IQ data printed at once seems to be limited.

RE: The number of IQ data printed at once seems to be limited.

xu shengxian — Wed, 11 Dec 2024 11:30:37 GMT

Thank you very much for your reply! I have solved this problem through this method before. But the problem I am currently facing is the Bluetooth sampling rate, which is 1M/s. I don't know if it can be improved. Some other development boards can increase the sampling rate to 4M/s. Although the test results are still good, it would be even better if the sampling rate could be improve.

RE: The number of IQ data printed at once seems to be limited.

yuva — Wed, 11 Dec 2024 10:43:15 GMT

Hi

I got the same issue of losing first 20 samples and I rectified it by printing 5 IQ samples at a time.
By printing this way, I didn't lose any IQ samples (Prints from IQ[0] to IQ[44] along with CTE statement)

for (uint8_t idx = 0; idx < report->sample_count-4; idx=idx+5) {
				if (report->sample_type == BT_DF_IQ_SAMPLE_8_BITS_INT) {
						printk(" IQ[%d]: %d, %d\n IQ[%d]: %d, %d\n IQ[%d]: %d, %d\n IQ[%d]: %d, %d\n IQ[%d]: %d, %d\n", 
						idx, report->sample[idx].i,report->sample[idx].q, 
						(idx+1), report->sample[idx+1].i, report->sample[idx+1].q,
						(idx+2), report->sample[idx+2].i, report->sample[idx+2].q,
						(idx+3), report->sample[idx+3].i, report->sample[idx+3].q,
						(idx+4), report->sample[idx+4].i, report->sample[idx+4].q);
				} else 
				if (IS_ENABLED(CONFIG_BT_DF_VS_CONN_IQ_REPORT_16_BITS_IQ_SAMPLES)) {
					printk(" IQ[%" PRIu8 "]: %d, %d\n", idx,
					       report->sample16[idx].i, report->sample16[idx].q);
				} else {
					printk("Unhandled vendor specific IQ samples type\n");
					break;
				}
			}

RE: The number of IQ data printed at once seems to be limited.

xu shengxian — Tue, 02 Apr 2024 07:29:38 GMT

Thank you!

RE: The number of IQ data printed at once seems to be limited.

Simonr — Tue, 02 Apr 2024 07:23:50 GMT

It should not be a problem to print the data in another format, so there is likely an issue with how it's being printed I'm afraid.

Best regards,

Simon

RE: The number of IQ data printed at once seems to be limited.

xu shengxian — Wed, 27 Mar 2024 11:49:48 GMT

Thank you for your reply!

I think I need to adjust the order of IQ data to restore its original order for further processing.

I need to adjust to：

But according to my testing, if I print the data in this way, some IQ data will be lost. Perhaps there is a problem with my code, and I am trying to modify it.

RE: The number of IQ data printed at once seems to be limited.

Simonr — Tue, 26 Mar 2024 12:53:39 GMT

How you read and print out the IQ data is entirely up to you. Can you explain what is inconvenient with the formatting of your modified print-outs exactly?

Best regards,

Simon