apps/grgsm_trx: fix inaccurate sample rate calculation
Change-Id: I0c309588fa0f7822abfb3919327639735db07679
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@ -46,7 +46,7 @@ class Application:
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base_port = 6700
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base_port = 6700
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# PHY specific
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# PHY specific
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phy_sample_rate = 4 * 1625000 / 6
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phy_sample_rate = radio_if.SAMPLE_RATE
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phy_freq_offset_hz = None
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phy_freq_offset_hz = None
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phy_tx_antenna = "TX/RX"
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phy_tx_antenna = "TX/RX"
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phy_rx_antenna = "RX2"
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phy_rx_antenna = "RX2"
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@ -75,6 +75,9 @@ class radio_if(gr.top_block):
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GSM_TS_PERIOD_uS = GSM_SYM_PERIOD_uS * 156.25
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GSM_TS_PERIOD_uS = GSM_SYM_PERIOD_uS * 156.25
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GSM_UL_DL_SHIFT_uS = -(GSM_TS_PERIOD_uS * 3)
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GSM_UL_DL_SHIFT_uS = -(GSM_TS_PERIOD_uS * 3)
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# TODO: explain where do these values come from?
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SAMPLE_RATE = 4.0 * 1625000.0 / 6.0
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# FIXME: shall be measured (automatically?) for
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# FIXME: shall be measured (automatically?) for
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# particular device and particular clock rate.
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# particular device and particular clock rate.
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# The current value is measured for USRP B2X0 at 26e6.
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# The current value is measured for USRP B2X0 at 26e6.
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