Method for the synchronous transmission of messages
A transmission method and synchronous technology, applied in transmission systems, digital transmission systems, and multiple use of transmission paths, etc., can solve the problems of reduced peak-to-average ratio, loss of channel utilization efficiency, anti-interference, and reduction, and achieve anti-interference. Sex-enhancing effect
Inactive Publication Date: 2015-11-11
SIEMENS AG
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Problems solved by technology
However, the methods listed in the aforementioned documents have the disadvantage that the peak-to-average ratio can only be reduced by means of additional expenditures for, for example, coding, filtering, etc., or by additionally transmitting accompanying information for the individual transmitted subsymbols
In addition, losses in channel utilization efficiency and / or a reduction in interference immunity have to be taken into account, especially in the case of OFDM
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[0037] figure 1 Shows in a schematic way an exemplary subsymbol SU in the frequency-time domain in the case of a conventional synchronous multi-carrier transmission method such as the so-called Orthogonal Frequency Multiplexing method or Orthogonal Frequency Division Multiplexing (OFDM) Constellation diagram where there is a continuous utilization of frequency fj. Here, the time domain t is plotted on the horizontal axis and the frequency domain f is plotted on the vertical axis. Here, the transmission channel UE used for transmitting messages in the form of a sequence of information elements or a sequence of information bits has an upper limit frequency f BU and the lower limit frequency f BL Limited bandwidth. The bandwidth or the transport channel UE is subdivided into different narrowband sub-channels, where in figure 1 Subchannel B is exemplarily depicted in .
[0038] For example, the subchannel B is assigned a carrier signal TA with a carrier frequency fj onto whic...
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The invention relates to a method for the synchronous transmission of messages (D1, D2). The messages (D1, D2) are composed of a sequence (C1, C2) of information bits and are transmitted in the form of sub-symbols (SU1, SU2) by means of a synchronous multi-carrier transmission method. Said sub-symbols (SU1, SU2) are composed of individually modulated carrier signals (TA1, TA2), wherein the carrier signals (TA1, TA2) are associated with different sub-channels (B) of a transmission channel (UE). The first carrier signals (TA1, TA2) that are used for forming a first sub-symbol (SU1) are arranged in a frequency time range for the transmission such that a protection interval (Tg) is created within a signal transmission period (T). The protection interval (Tg) is then used for transmitting at least one second sub-symbol (SU2), wherein the at least second sub-symbol (SU2) is formed from second carrier signals (TA2) that differ from the first carrier signals (TA1) of the first sub-symbol (SU1). Said first carrier symbols (TA1) of the first sub-symbol (SU1) may optionally be partially overlapped in the time and / or frequency range by at least the second carrier signals (TA2) of the at least second sub-symbol. The method ideally and simply combines an increase in interference immunity for a transmission of messages (D1, D2) with good spectral efficiency that is provided by a synchronous transmission of messages (D1, D2) via a plurality of sub-channels (B) of a transmission channel (UE). DRAWING: No translation required.
Description
technical field [0001] The invention relates to a method for synchronously transmitting messages. The message consists of a sequence of information bits and is transmitted in the form of subsymbols by means of the so-called synchronous multicarrier transmission method. These subsymbols consist of individually modulated carrier signals, wherein the carrier signals are assigned to different subchannels of the transmission channel. Background technique [0002] A communication system or a communication network in communication technology is generally a device or an infrastructure for transmitting information, which may be present, for example, in the form of a message consisting of a sequence of information units or information bits. In this case, the communication system establishes a message connection between a plurality of terminals or between one or more senders and one or more receivers. Here, if the same clock is used by the sender and the receiver, or if the sender an...
Claims
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IPC IPC(8): H04L27/26H04L5/00
CPCH04L5/0044H04L5/0012H04L27/2618
Inventor J.库斯克
Owner SIEMENS AG