17915327. MULTI-USER PRECODING simplified abstract (Telefonaktiebolaget LM Ericsson (publ))

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MULTI-USER PRECODING

Organization Name

Telefonaktiebolaget LM Ericsson (publ)

Inventor(s)

Ulf Gustavsson of Göteborg (SE)

Alex Alvarado of WC Den Bosch (NL)

Frans M.J. Willems of EB Geldrop (NL)

Amirashkan Farsael of CX Eindhoven (NL)

MULTI-USER PRECODING - A simplified explanation of the abstract

This abstract first appeared for US patent application 17915327 titled 'MULTI-USER PRECODING

Simplified Explanation

The patent application describes a method for optimizing the transmission of signals from a multi-user, multi-antenna transmitter to a group of users. The method involves determining the spatial correlation between pairs of users and setting a correlation threshold based on the number of users. If any pairs of users have a correlation value above the threshold, one user is discarded and the threshold is updated. This process is repeated until none of the correlation values exceed the updated threshold. The method then generates the signals for transmission using pre-coding.

  • The method optimizes the transmission of signals to multiple users in a multi-antenna system.
  • It determines the spatial correlation between pairs of users to identify potential interference.
  • The method discards users with high correlation values to reduce interference and improve signal quality.
  • The correlation threshold is dynamically adjusted based on the number of remaining users.
  • Pre-coding is applied to generate the signals for transmission, further enhancing the efficiency of the system.

Potential Applications

  • This method can be applied in wireless communication systems, such as cellular networks, to improve the performance of multi-user transmissions.
  • It can be used in scenarios where multiple users are simultaneously accessing a network, such as in crowded areas or during peak usage times.
  • The method can be implemented in base stations or transmitters to optimize the transmission of signals to multiple users in various communication technologies.

Problems Solved

  • The method addresses the issue of interference between users in multi-antenna systems.
  • It solves the problem of optimizing signal transmission to multiple users in a dynamic and efficient manner.
  • The method reduces the impact of spatial correlation on signal quality and improves overall system performance.

Benefits

  • By discarding users with high spatial correlation, the method reduces interference and improves signal quality for all users.
  • The dynamic adjustment of the correlation threshold ensures optimal performance based on the number of users.
  • The use of pre-coding further enhances the efficiency of signal transmission, maximizing the capacity of the system.
  • Overall, the method improves the reliability, throughput, and user experience in multi-user, multi-antenna communication systems.


Original Abstract Submitted

A pre-coding method is disclosed of a multi-user, multi-antenna transmitter configured for transmission of respective signals to a plurality of users. The method comprises determining (for each pair of users of the plurality) a spatial correlation value for the pair of users, and determining a first correlation threshold value based on the number of users of the plurality. The method also comprises determining whether or not one or more pairs of users has a spatial correlation value that falls on or above the first correlation threshold value. When one or more pairs of users has a spatial correlation value that falls on or above the first correlation threshold value, the method comprises discarding one user comprised in at least one of the one or more pairs to provide a reduced plurality of users, and updating the first correlation threshold value based on the number of users of the reduced plurality. The discarding and updating steps are repeated until none of the spatial correlation values falls on or above the updated first correlation threshold value. Then, the method comprises generating the respective signals for transmission to the users of the reduced plurality by application of pre-coding. Corresponding apparatus, transmitter, base station and computer program product are also disclosed.

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