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#!/usr/bin/env python
from gnuradio import gr, digital
from gnuradio.digital.utils import tagged_streams
import random
if __name__ == '__main__':
tb = gr.top_block()
fft_len = 64
cp_len = 16
length_tag_name = "length"
src = gr.vector_source_c(
[random.randint(0, 1)*2-1 for i in range(10*fft_len)], True, fft_len,
tagged_streams.make_lengthtags((10,), (0,), length_tag_name))
cyclic_prefixer = digital.ofdm_cyclic_prefixer(
fft_len, fft_len+cp_len, 0, length_tag_name)
sink = gr.null_sink(gr.sizeof_gr_complex)
checker = digital.tagged_stream_check(gr.sizeof_gr_complex*fft_len, length_tag_name)
checker2 = digital.tagged_stream_check(gr.sizeof_gr_complex*fft_len, length_tag_name)
tb.connect(src, checker, cyclic_prefixer, sink)
tb.run()
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