Patent
Device for two-way radio traffic
Reads0
Chats0
TLDR
In this article, the authors proposed a two-way radio traffic using the time division multiplex (TDMM) method for signal transmission from and to the subscriber, where a digital microprocessor controller (MPS) is allocated to the radio unit (FG) for analog signals on the AF side with analog-digital converters (5, 8) on the input side and digital-analog converters on the output side and with means (storage and control elements) for time compression of the signal to be transmitted and for expansion of the received signal and for soft keyingAbstract:
The invention relates to a device for two-way radio traffic using the time division multiplex method for signal transmission from and to the subscriber. A device of this type is intended to be simple in its design and to guarantee interference-free function. The invention provides for this purpose that a digital microprocessor controller (MPS) is allocated to the radio unit (FG) for analog signals on the AF side with analog-digital converters (5, 8) on the input side and digital-analog converters (7, 10) on the output side and with means (storage and control elements) for time compression of the signal to be transmitted and for expansion of the received signal and for soft keying of the transmitter and synchronisation of the radio unit (FG) to an already operating distant station.read more
Citations
More filters
Patent
Seamless frequency hopping system
TL;DR: In this article, a seamless frequency hopping system utilizes a programmable digital signal processor with interface circuitry in conjunction with a frequency hopping radio to incorporate the concepts of audio time compression, hop by hop automatic gain control and time repeating squelch to improve the sound of frequency hopped analog communication.
Patent
Transmitter stage switching method for radio communication device
TL;DR: In this paper, the authors present a method for using a radio communications device, which includes a memory and a digital-to-analogue (DAC) converter, receiving a data word, which contains the value of a control signal in digital form.
Patent
Transmitter stage switching method for mobile telephone system
TL;DR: In this article, the shape of the control signal can be empirically determined according to the operation of the transmitter stage by the steep rise in the control signals for the acceleration pulse.
Patent
Transmitter with a controllable power amplifier
TL;DR: In this paper, a transmitter with a controllable power amplifier whose output signal (RFout) is fed back to a control input of the power amplifier via a device which supplies a detector signal (Ud) to detect the output power of the amplifier.
References
More filters
Patent
Digital data transmission system - has A=D converter to allow data buffer memories at transmitter and receiver to handle voice signals
TL;DR: In this paper, the A/D converter is connected to the input of the transmit memory and an address generator adds the address of the wanted receiver to the voice signals being sent.