Method and device for determining a pilot sequence, associated method for estimating a channel and computer program

A device for determining a pilot sequence including a plurality of pilot vectors to be transmitted in a communication channel modeled by a model vector including at least one complex-valued function which is variable as a function of a plurality of real parameters and descriptive of a transmission from a transmitting antenna to a receiving antenna through the communication channel, the device comprising at least one processor configured to:

• determine an orthogonal basis of a real vector space that is the image of a matrix having, respectively as columns, the partial derivatives of the model vector with respect to the various real parameters;
• and
• construct the pilot vectors using the determined orthogonal basis, by grouping the orthogonal vectors of the orthogonal basis in at least one pair and by producing, for each of the at least one pair comprising a first vector and a second vector, a pilot vector by summation of the first vector and the product of the second vector by an imaginary number.