4. Telephonic communications
  5. With usage measurement
  6. Call charge metering or monitoring

Telecommunications Research Laboratories

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Adaptive hybrid ARQ systems with BCJR decoding

Error detection/correction and fault detection/recovery – Pulse or data error handling – Digital data error correction
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Analog radio system with acoustic transmission properties

Multiplex communications – Communication over free space – Combining or distributing information via time channels
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Asymmetric equalization system for data transmission

Pulse or digital communications – Equalizers
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Broadband compact slot dipole/monopole and electric...

Communications: radio wave antennas – Antennas – Slot type
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Channel code decoding for the CDMA forward link

Telecommunications – Receiver or analog modulated signal frequency converter – Measuring or testing of receiver
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