I am working on tx_voice.py and rx_voice.py and I am trying to embed a fixed
sequence in the payload part of my packet. However, when i try to receive the
data using rx_voice, i get an error saying
terminate called after throwing an instance of 'std::runtime_error'
what(): msg length is not a multiple of d_itemsize
Aborted (core dumped)
I have added only one line in make_packet in packet_utils.py and it looks like
this:(just the important lines as i thought)
def make_packet(payload, samples_per_symbol, bits_per_symbol,
access_code=default_access_code, pad_for_usrp=True):
(packed_access_code, padded) =
conv_1_0_string_to_packed_binary_string(access_code)
(packed_preamble, ignore) =
conv_1_0_string_to_packed_binary_string(preamble)
payload = packed_preamble + payload
payload_with_crc = gru.gen_and_append_crc32(payload)
pkt = ''.join((packed_access_code, make_header(L),
whiten(payload_with_crc), '\x55'))
if pad_for_usrp:
pkt = pkt + (_npadding_bytes(len(pkt), samples_per_symbol,
bits_per_symbol) * '\x55')
return pkt
Can anyone please explain how to remove this error. I want to add fixed
sequence so that it helps in calculation of BER.
Thanks,
Pratik Hetamsaria
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