Transmission method and transmission apparatus for transmitting signals on the basis of a OFDM/TDMA-system with pilot symbols
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United States of America Patent
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Apr 8, 2003
Grant Date -
N/A
app pub date -
Feb 19, 1999
filing date -
Feb 22, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a transmission method and a transmission apparatus for transmitting signals on the basis of a OFDM/TDMA-system, wherein a plurality of subcarriers being orthogonal to each other are allocated to a variable number of channels, each channel containing a variable number of subcarriers depending on information to be transmitted in said signals, wherein, for the transmission of said signals in a GSM-system having a constant number of predetermined GSM-frequency channels and a constant number of predetermined GSM-timeslots being grouped in GSM-frames, the number of said subcarriers is allocated corresponding to the bandwidth of said GSM-frequency channels, so that a multiple of one resulting OFDM/TDMA-timeslot matches with one or a multiple of one GSM-timeslots, wherein a pilot symbol is allocated to every n-th subcarrier in said GSM-frequency-channels, whereby n is an integer and>1, and wherein said signals are transmitted. The present invention also proposes a receiving method and a receiving apparatus for receiving corresponding signals. Thereby, a reliable channel estimate and equalization can be performed.
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