Patent ID: 8913963

Claim:
An apparatus for providing a simulated radio channel having a defined characteristic between a first device and a second device in a test environment, wherein the apparatus comprises: a first antenna configured to transmit signals and to provide a first radio channel between the first antenna and the second device; a second antenna configured to transmit signals and to provide a second radio channel between the second antenna and the second device, wherein a characteristic of the second radio channel is dissimilar to a characteristic of the first radio channel; a splitting circuit configured to split a signal received from the first device into at least two split signals, and to forward at least one of the at least two split signals to the first antenna and at least one of the at least two split signals to the second antenna; a modifying circuit configured to modify a relation between the at least two split signals, thereby providing the simulated radio channel between the first device and the second device, the simulated radio channel having a characteristic that combines, in a relation corresponding to the modified relation, the characteristic of the second radio channel and the characteristic of the first radio channel; and a delay circuit comprising: an input configured to receive at least part of at least one of the at least two splits signals; a delay configured to delay the received at least part of the at least one of the at least two split signals to produce a delayed output signal; and output configured to forward the delayed output signal towards the second device, wherein the input is further configured to receive at least part of the forward delayed output signal; wherein the delay is further configured to delay the received at least part of the forwarded delayed output signal to produce a further delayed output signal; and wherein the output is further configured to forward the further delayed output signal towards the second device.