Exjobbsförslag från företag

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Förslaget inkom 2006-05-22

MIMO for Mobile Broadband: Modelling and Performance Analysis

Place: Ericsson AB, Kista. WCDMA Radio Access Network System Management.

Starting Date: August-September 2006 (proposed)

Thesis Description: The introduction of Multiple-Input-Multiple-Output (MIMO) technology in WCDMA offers the potential for substantial gains in user and system performance. The development of new advanced Radio Resource Management (RRM) functionality will be required to fully realise this potential. This thesis will examine and evaluate the RRM functionality modifications required in a WCDMA Radio Access Network in this context and propose recommended solutions. The work will be performed by means of computer simulations in a Matlab-based radio network simulator. The aim of the investigation is to identify a RRM solution for MIMO in WCDMA that can provide good system capacity, stability and end-user performance.

Background: A lot of effort is being spent in the mobile industry to further increase the system capacity and performance in WCDMA radio network systems. For example, the introduction of multiple transmitter and receiver antennas together with novel transmission and signal processing schemes provides the possibility for a significant performance boost. MIMO is one technique that is able to utilize the multiple antennas to achieve higher user bit rates and greater system capacity. With MIMO, multiple data streams can be simultaneously transmitted to a given user over the same physical radio channel using appropriate powers and rates for each stream. MIMO is currently being studied in 3GPP standardization as an enhancement to High Speed Downlink Packet Access (HSDPA) technology in WCDMA, so-called “Turbo 3G”.

Problem Statement: Introducing a MIMO concept in a cellular system is likely to have a significant impact on the Radio Resource Management of the system, in this case the HSDPA scheduling solution in particular. To work well with MIMO, input information to the HSDPA scheduler, such as radio quality feedback from the terminal and system resource utilization, needs to be updated and considered in a modified way. This is in order to be able to select the optimal rates and radio paths. To date, no complete HSDPA scheduler solution for MIMO in WCDMA has been identified and evaluated. By means of computer simulations and/or analytical techniques, the thesis student will identify and evaluate RRM solutions connected to MIMO that are consistent with the outcome of the relevant activities in 3GPP standardization. These results will then be used to recommend and outline a solution for efficient RRM functionality in the further development of HSDPA.

Application: By e-mail, including a list of courses with marks and a CV. Applications close on May 21.

Suitable Background: Electrical Engineering, Engineering Physics or Computer Engineering, 180 points or equivalent. Good marks are a plus. Advanced courses in control theory, signal processing, queuing theory and performance analysis are an advantage.


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