From: On massive MIMO performance with semi-orthogonal pilot-assisted channel estimation
Symbols | Constraints | Meanings |
---|---|---|
yk[i] |
| Received signal at the BS when the |
k th user transmits pilot | ||
wk[i] |
| Unit variance AWGN when the |
k thuser transmits pilot | ||
φ k | , | The k th user’s pilot |
|
| The t th user’s uplink data signal when |
the k th user transmits pilot | ||
q t [i] |
| The t th user’s uplink data signal |
after the channel estimation period | ||
s t [i] |
| The t th user’s downlink data signal |