Demodulation of multi-user, multi-protocol data in a reconfigurable datapath

• US 7,236,500 B1
• Filed: 12/19/2000
• Issued: 06/26/2007
• Est. Priority Date: 12/19/2000
• Status: Expired due to Fees

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Greenberg, Craig B.
• Primary Examiner(s): Chan; Wing
• Assistant Examiner(s): LEE, ANDREW CHUNG CHEUNG
• Application Number:
  US09/742,811
• Time in Patent Office: 2,380 Days
• Field of Search: 370/466, 370/238, 370/328, 370/329, 370/335, 370/342, 370/341, 370/431, 370/441, 340/438, 455/552
• US Class Current: 370/466
• CPC Class Codes: H04B 1/0003 Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain digital baseband systems H04L25/00; digital modulation/demodulation H04L27/00; CDMA H04B1/707; TDMA H04B7/2643; image transmission H04N5/00
• CPC Class Codes: H04B 1/406 with more than one transmission mode, e.g. analog and digital modes
• CPC Class Codes: H04B 2201/7071 with dynamic control of receiver resources

Abstract

A system and method of demodulating antenna data containing multiple signals in multiple protocols for multiple users is disclosed. The method comprises buffering the antenna data with an input buffer of the demodulation system. Next, the protocol to be demodulated is determined and a dynamically reconfigurable datapath for the system is configured for that protocol. The antenna data containing multiple signals is read from the input buffer, demodulated by the datapath, and stored in an output buffer. The next protocol to be demodulated is determined and the datapath is configured appropriately. Again, the signal for each of the users is demodulated by the datapath and the output data is stored in the output buffer. This process continues until all of the signals for all of the users have been demodulated for all of the prescribed protocols.

Claims

1. A method to demodulate a signal comprising:

receiving modulated data by an antenna;

storing the received modulated data in a buffer;

configuring a first datapath from several predefined configurations, wherein a type of data encoding for the received modulated data stored in the buffer for a first user establishes a protocol that determines a configuration for the first datapath;

configuring a second datapath from the several predefined configurations based on a protocol for the type of data encoding for the received modulated data stored in the buffer for the second user; and

operating the first and second datapaths in parallel to demodulate the received modulated data of the first user and the second user.

2. The method of claim 1 wherein configuring the first datapath further includes using a first controller to provide the configuration selected for the first datapath and configuring the second datapath includes using a second controller to provide the configuration selected for the second datapath.

3. The method of claim 1 further including using a first output buffer coupled to the first datapath and a second output buffer coupled to the second datapath to store data for the first user and the second user.

4. A system for demodulating signals comprising:

an antenna;

first and second datapaths coupled to the antenna;

an input buffer to store the data received by the antenna and provide the data to the first datapath and to the second datapath; and

a first controller to select a protocol and configure the first datapath to accept modulated data from the antenna and provide demodulated data in accordance with the protocol and a second controller to configure the second datapath to operate in parallel with the first datapath.

5. The system of claim 4 further including a first output buffer for storing the demodulated data from the first datapath and a second output buffer coupled to the second datapath.