Class: PWN::SDR::Decoder::LTE::AcquiredPBCHIQ

Inherits:
PBCHIQ
  • Object
show all
Defined in:
lib/pwn/sdr/decoder/lte.rb

Overview

Continuous offline IQ acquisition; overlap protects SF0 at window edges. Only a CRC-verified PBCH payload is emitted, never a synchronization hit.

Instance Method Summary collapse

Constructor Details

#initialize ⇒ AcquiredPBCHIQ

Returns a new instance of AcquiredPBCHIQ.



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# File 'lib/pwn/sdr/decoder/lte.rb', line 88

def initialize
  super(pci: nil)
  @native.attach_function :pwn_lte_acquire, %i[pointer uint pointer pointer pointer pointer], :int
  @sample_offset = 0
  @last_timing = nil
end

Instance Method Details

#feed_iq(samples, rate: nil) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/pwn/sdr/decoder/lte.rb', line 95

def feed_iq(samples, rate: nil)
  raise ArgumentError, 'PBCH requires 1.92 Msps' if rate && rate != FS_BASE

  @buffer.concat(samples)
  while @buffer.length >= 19_200
    frame = acquire(@buffer.first(19_200))
    yield frame if frame
    @buffer.shift(15_360)
    @sample_offset += 7680
  end
end

#flush {|frame| ... } ⇒ Object

Yields:

  • (frame) 


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# File 'lib/pwn/sdr/decoder/lte.rb', line 107

def flush
  frame = acquire(@buffer) if @buffer.length >= 3840
  yield frame if frame
  @buffer.clear
end