Time division multiplexing communication system with parallel structure and method for the same

• US 8,406,259 B2
• Filed: 08/08/2008
• Issued: 03/26/2013
• Est. Priority Date: 08/10/2007
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Kwon, Hyoung Jin, Lee, Woo Yong, Kim, Kyeongpyo, Kim, Jin Kyeong, Kim, Yong Sun
• Primary Examiner(s): Thier, Michael
• Assistant Examiner(s): LOUIS, VINNCELAS
• Application Number:
  US12/672,735
• Publication Number:
  US 20110032953A1
• Time in Patent Office: 1,691 Days
• Field of Search: 370203-210, 370/320, 370329-330, 370334-335, 370/390, 370/366, 370/441, 370/437, 375/260, 375/267, 375/299, 375/152, 375/144, 375/148, 375/222, 375/347, 455/102, 455/130, 455/447, 455/277.1, 455/456.1, 455/140, 455/101, 398/79, 398/147, 398/98, 714/727
• US Class Current: 370/535
• CPC Class Codes: H04B 7/2643 using time-division multiple access [TDMA] H04B7/2615, H04B7/2618 take precedence

Abstract

Disclosed are a Time Division Multiplexing (TDM) communication system with a parallel structure and a method for the same. A transmission apparatus of the TDM communication system with the parallel structure includes a Time Division Demultiplexer (TDDM) to perform time division demultiplexing of inputted first serial signals to thereby output the demultiplexed serial signals as a plurality of parallel signals, a plurality of modulators to respectively modulate the outputted parallel signals; a Time Division Multiplexer (TDM) to adjust a multiplexing ratio according to channel-related information, and to perform time division multiplexing of each of the modulated parallel signals in the adjusted multiplexing ratio to thereby output the multiplexed parallel signals as second serial signals, and a transmission antenna to transmit the outputted second serial signals.

Claims

1. A transmission apparatus of a Time Division Multiplexing communication system with a parallel structure, the transmission apparatus comprising:

a Time Division Demultiplexer (TDDM) to perform time division demultiplexing of inputted first serial signals to thereby output the demultiplexed serial signals as a plurality of parallel signals;

a plurality of modulators to respectively modulate the outputted parallel signals;

a Time Division Multiplexer (TDM) to adjust a multiplexing ratio according to at least two or more different channel-related information, and to perform time division multiplexing of each of the modulated parallel signals in the adjusted multiplexing ratio to thereby output the multiplexed parallel signals as second serial signals, and

wherein the respective second serial signals from the at least two or more different channel-related information are different; and

a transmission antenna to transmit the outputted second serial signals,

wherein the TDM compares a time diversity gain with a maximum time diversity gain when the time diversity gain is requested from a receiving apparatus, determines a number of the parallel signals to correspond to the maximum time diversity gain based on the compared result, and performs time division multiplexing of the determined number of parallel signals.

4. The transmission apparatus as in any one of claims 1, 2, and 3, wherein the TDM adjusts a time diversity gain according to the channel-related information, and adjusts the multiplexing ratio according to the adjusted time diversity gain.

2. A transmission apparatus of a Time Division Multiplexing communication system with a parallel structure, the transmission apparatus comprising:

a Time Division Demultiplexer (TDDM) to perform time division demultiplexing of inputted first serial signals to thereby output the demultiplexed serial signals as a plurality of parallel signals;

a plurality of modulators to respectively modulate the outputted parallel signals;

a Time Division Multiplexer (TDM) to adjust a multiplexing ratio according to at least two or more different channel-related information, and to perform time division multiplexing of each of the modulated parallel signals in the adjusted multiplexing ratio to thereby output the multiplexed parallel signals as second serial signals, and

wherein the respective second serial signals from the at least two or more different channel-related information are different; and

a transmission antenna to transmit the outputted second serial signals,

wherein when assignment of the transmission rate or bandwidth is requested from a receiving apparatus, the TDM compares, with a maximum transmission ratio, a transmission ratio of the requested transmission rate to another transmission rate for each of the parallel signals, determines a number of the parallel signals to correspond to the transmission ratio based on the compared result, and performs time division multiplexing of the determined number of parallel signals.

3. A transmission apparatus of a Time Division Multiplexing communication system with a parallel structure, the transmission apparatus comprising:

a Time Division Demultiplexer (TDDM) to perform time division demultiplexing of inputted first serial signals to thereby output the demultiplexed serial signals as a plurality of parallel signals;

a plurality of modulators to respectively modulate the outputted parallel signals;

a Time Division Multiplexer (TDM) to adjust a multiplexing ratio according to at least two or more different channel-related information, and to perform time division multiplexing of each of the modulated parallel signals in the adjusted multiplexing ratio to thereby output the multiplexed parallel signals as second serial signals, and

wherein the respective second serial signals from the at least two or more different channel-related information are different; and

a transmission antenna to transmit the outputted second serial signals,

wherein when assignment of the transmission rate or bandwidth and time diversity gains are requested from a receiving apparatus, the TDM compares, with a maximum time diversity gain, the sum of a transmission ratio of the requested transmission rate to another transmission rate for each of the parallel signals and the requested time diversity, determines a number of the parallel signals to correspond to the maximum time diversity gain based on the compared result, and performs time division multiplexing of the determined number of parallel signals.

5. A receiving apparatus of a Time Division Multiplexing communication system with a parallel structure, the receiving apparatus comprising:

a receiving antenna to receive second serial signals from a transmission apparatus, and

wherein the received second serial signals are configured to have at least two or more different multiplexing ratios from the transmission apparatus;

a Time Division Demultiplexer (TDDM) to perform time division demultiplexing of the received second serial signals in a demultiplexing ratio corresponding to each of the two or more different multiplexing ratios of the transmission apparatus to thereby output the demultiplexed serial signals as a plurality of parallel signals;

a plurality of demodulators to respectively demodulate the outputted parallel signals; and

a Time Division Multiplexer (TDM) to perform time division multiplexing of each of the demodulated parallel signals to thereby restore the multiplexed parallel signals as a first serial signal,

wherein the TDM compares a time diversity gain with a maximum time diversity gain when the time diversity gain is requested, determines a number of the parallel signals to correspond to the maximum time diversity gain based on the compared result, and performs time division multiplexing of the determined number of parallel signals.

6. A transmission method of a time division multiplexing communication system with a parallel structure, the transmission method comprising:

performing time division demultiplexing of inputted first serial signals to thereby output the demultiplexed serial signals as a plurality of parallel signals;

modulating each of the outputted parallel signals,

wherein the performing of the time division multiplexing comprises;

comparing a time diversity gain with a maximum time diversity gain when the time diversity gain is requested from a receiving apparatus;

determining a number of the parallel signals to correspond to the maximum time diversity gain based on the compared result;

performing time division multiplexing of the determined number of parallel signals;

adjusting a multiplexing ratio according to a channel state and a frequency bandwidth, and performing time division multiplexing of each of the plurality of the demodulated parallel signals to thereby output the multiplexed parallel signals as second serial signals; and

transmitting the outputted second serial signals.

9. The transmission method as in any one of claims 6, 7, and 8, wherein the performing of the time division multiplexing comprises:

adjusting a time diversity gain according to channel related information; and

adjusting the multiplexing ratio according to the adjusted time diversity gain.

7. A transmission method of a time division multiplexing communication system with a parallel structure, the transmission method comprising:

performing time division demultiplexing of inputted first serial signals to thereby output the demultiplexed serial signals as a plurality of parallel signals;

modulating each of the outputted parallel signals,

wherein the performing of the time division multiplexing comprises;

comparing, with a maximum transmission ratio, a transmission ratio of a transmission rate to another transmission rate for each of the parallel signals when assignment of the transmission rate or bandwidth is requested from a receiving apparatus;

determining a number of the parallel signals to correspond to the transmission rate based on the compared result;

performing time division multiplexing of the determined number of parallel signals;

adjusting a multiplexing ratio according to a channel state and a frequency bandwidth, and performing time division multiplexing of each of the plurality of the demodulated parallel signals to thereby output the multiplexed parallel signals as second serial signals; and

transmitting the outputted second serial signals.

8. A transmission method of a time division multiplexing communication system with a parallel structure, the transmission method comprising:

performing time division demultiplexing of inputted first serial signals to thereby output the demultiplexed serial signals as a plurality of parallel signals;

modulating each of the outputted parallel signals,

wherein the performing of the time division multiplexing comprises;

comparing, with a maximum time diversity gain, the sum of a transmission ratio of a transmission rate to another transmission rate for each of the parallel signals and time diversity gain when assignment of the transmission rate or bandwidth, and the time diversity gain are requested from a receiving apparatus;

determining a number of the parallel signals to correspond to the maximum time diversity gain based on the compared result;

performing time division multiplexing of the determined number of parallel signals;

adjusting a multiplexing ratio according to a channel state and a frequency bandwidth, and performing time division multiplexing of each of the plurality of the demodulated parallel signals to thereby output the multiplexed parallel signals as second serial signals; and

transmitting the outputted second serial signals.

10. A receiving method of a time division multiplexing communication system with a parallel structure, the receiving method comprising:

receiving second serial signals from a transmission apparatus;

performing time division demultiplexing of the received second serial signals in a demultiplexing ratio corresponding to a multiplexing ratio of the transmission apparatus to thereby output the demultiplexed serial signals as a plurality of parallel signals;

respectively demodulating the outputted parallel signals; and

performing time division multiplexing of each of the demodulated parallel signals as first serial signals,

wherein the received second signal from the transmission apparatus comprises;

performing time division demultiplexing from the inputted first serial signals to thereby output the demultiplexed serial signals as a plurality of parallel signals;

modulating each of the outputted parallel signals, and

wherein the performing of the time division multiplexing comprises;

comparing a time diversity gain with a maximum time diversity gain when the time diversity gain is requested from a receiving apparatus;

determining a number of the parallel signals to correspond to the maximum time diversity gain based on the compared result; and

performing time division multiplexing of the determined number of parallel signals;

adjusting a multiplexing ratio according to a channel state and a frequency bandwidth, and performing time division multiplexing of each of the plurality of the demodulated parallel signals to thereby output the multiplexed parallel signals as second serial signals; and

transmitting the outputted second serial signals as the received second serial signals.